biology |
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habitat : the natural
abode or locality of an animal, plant, etc.; the kind of locality in
which a plant grows.
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meteorology |
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hail
: showery precipitation in
the form of irregular pellets or balls of ice more than 5 mm in
diameter, falling from a cumulonimbus cloud. Hail size typically
refers to the diameter of the hailstones; warnings and reports may
report hail size through comparisons with real-world objects that
correspond to certain diameters:
diam./inch |
0.25 |
0.5 |
0.75 |
0.88 |
1 |
1.25 |
1.5 |
description |
pea |
marble
or mothball |
penny
or dime |
nickel |
quarter |
half dollar |
walnut or
ping pong ball |
diam./inch |
1.75 |
2 |
2.5 |
2.75 |
3 |
4 |
4.5 |
description |
golf ball |
hen's egg |
tennis ball |
baseball |
tea cup |
grapefruit |
softball |
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games :
tennis |
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hardcourt : a tennis
court whose surface is made out of asphalt, concrete or a similar
material; for example, the U.S. and Australian Opens are played on
hardcourts.
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botany
& gardening |
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head : a group of flowers
placed closely together; a dense cluster of sessile or nearly
sessile flowers on a short receptacle, e.g. sunflower.
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geography
: physical |
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headland : an area of
land adjacent to water on three sides. Large, long, narrow and high
headlands are called peninsulas or promontories. When headlands
dramatically affect the ocean currents they are often called capes.
A deposition headland is called a spit. |
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hearing
or audition : the subjective
response to sound, including the entire mechanism of the outer,
middle, and internal ear, and the nervous and cerebral processes
which translate the sound into meaningful signals; the sense of
sound perception from tiny hair fibers in the inner ear detecting
the motion of a membrane which vibrates in response to changes in
the pressure exerted by air molecules, within a frequency range (at
best) of 20 to 20000 Hz, though this varies significantly with age,
occupational hearing damage, and gender. Sound can also be detected
as vibrations conducted through the body by tactition, including
frequencies lower and higher than ear range.
Human ear is not equally
sensitive to all the frequencies of sound within the entire
spectrum: middle ‘A‘and its higher harmonics (from 2 to 4 kHz)
are at maximum human sensitivity. On sound pressure scale, the
normal range of human hearing extends from about 0 dB (threshold of
hearing) to about 140 dB; threshold of pain is about135 dB. |
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hedonism :
pleasure-seeking as a way of life; in philosophy, the doctrine that
pleasure is the principal good and should be the aim of action; in
psychology, the theory that a person's actions always have pleasure
as their purpose. |
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botany
& gardening |
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herb : any seed plant whose
stem withers away to the ground after each season's growth, as
distinguished from a tree or shrub whose woody stem lives from year
to year; also, any such plant used in cooking for its savory or
aromatic qualities, or in medicine; mint, thyme, basil, ans sage are
herbs. |
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Heritage Foundation,
The : an influential public policy research
institute based in Washington, DC, United States. Heritage's
stated mission is to "formulate and promote conservative public
policies based on the principles of free enterprise, limited
government, individual freedom, traditional American values, and a
strong national defense." Its operations have transformed the
traditional concept of the 'think tank' and have had a significant
impact on the domestic and foreign policies of the US
government. http://www.heritage.org |
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botany
& gardening |
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hesperidium : a
fleshy fruit with a separate thick envelope (separable, leathery
rind), and divided internally into several separable pulpy cells by
membranous dissepiments, as the orange or lemon. |
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linguistics |
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heteronym
(also: heterophone) : a
homonym with a single spelling but different meanings and
pronunciations' e.g. desert (to abandon) and desert (arid region),
because they are pronounced differently. Heteronyms are homographs
which are not homophones. |
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heuristic
: serving to indicate or point out; stimulating interest as a means of
furthering investigation. |
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Internet
lingo |
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HHOK
: ha, ha - only kidding |
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botany
& gardening |
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hirsute
: hairy; shaggy. |
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botany
& gardening |
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hispid
: bristly, rough with bristles or minute spines. |
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homeland
: geographical territory to which one belongs; however, this general
concept is usually simplified to the country of one's origin. Synonyms:
fatherland, motherland, mother country, country of origin, and
native land. |
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linguistics |
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homograph
: one of two or more words that is spelled the same
as another but has a different meaning (such as bear (the
animal) and bear (to support, to tolerate)) or
pronunciation (such as bow (a weapon for shooting arrows) and
bow (the front end of a boat)) and usually a
different etymology; thus all homographs are homonyms (but not vice
versa). |
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linguistics |
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homonym
: one of two or more words that is of the same
spelling or sound (pronunciation) as another but with a different
meaning, such as grate (fireplace), grate (to rub), great
(large). |
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computing &
web acronym |
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HSB : hue,
saturation, brightness; see HSB color model; |
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HSB
color model : a color model based on the human perception
of color by employing hue, saturation, and brightness as the three
parameters of the model; is often used by artists because it is more
natural to think about a color in terms of hue and saturation than
in terms of additive or subtractive color components. |
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color
model
hue
saturation
brightness |
acronym
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HSDB
: Hazardous Substance Data Bank : a factual data bank
focusing on the toxicology of over 4500 potentially hazardous
chemicals; in addition to toxicity data, the file carries
information in the areas of emergency handling procedures,
environmental fate, human exposure, detection methods, and
regulatory requirements. The data are fully referenced and
peer-reviewed by a Scientific Review Panel composed of expert
toxicologists and other scientists |
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computing &
web acronym
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HSL : hue,
saturation, lightness/luminance; HSL color model is quite similar to
HSB, with lightness replacing brightness; the difference is
that the brightness of a pure color is equal to the brightness of
white, while the lightness of a pure color is equal to the lightness
of a medium gray. |
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computing &
web acronym |
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HSV
: hue, saturation, value; HSV color model is also called HSB color
model; |
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computing &
web acronym |
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HTML
: Hypertext Markup Language : The standard
set of instructions for creating hypertext documents. HTML tags
text, graphics and images with instructions that tell a browser how
to present them in electronic documents. HTML instructions include
tags about appearance, like bold and centered text, and hyperlinks
to other documents. HTML is a specific document type derived from
the Standard Generalized Markup Language (SGML). |
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SGML |
computing &
web acronym |
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HTTP : Hypertext
Transfer Protocol : he standard network protocol
for retrieving hypertext documents. HTTP allows computers to send
and receive HTML files over IP networks, including the Internet.
HTML files are located by addresses called Universal Resource
Locators (URLs). Web addresses often begin with http://, indicating
that the documents you will access are written in HTML. HTTP
protocol signifies an Internet site is a WWW site, i.e. HTTP is a
WWW address. |
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HTML
IP
URL |
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hue
: light (color) reflected from or transmitted through an object; it
is measured as an angle location on the standard color wheel,
expressed as a degree between 0o and 360o;
used as a parameter in the HSB color model. In common use, hue is
identified by the name of the color, such as red or orange. |
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humidity
: atmospheric water vapor content, expressed in any of several
measures, such as relative humidity or dew point (temperature). |
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abbreviation |
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hwy : highway |
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botany
& gardening |
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hymenium
: the fertile, spore-producing structure of certain fungi, as that
of the gills of the mushroom. |
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hyperlink
: text or images on a Web page that, when clicked with a mouse,
cause the browser to load another page of HTML. Because a simple
mouse click allows the user to easily go from one page of hypertext
to another, these pages are said to be ‘hyperlinked’. Text links
are usually (but not always) underlined in blue, while hyperlinks
that are images often take the form of "buttons". |
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hypertext
: a document which has been marked up to allow a user to select
words or pictures within the document as hyperlinks, click on them,
and connect to further information. |
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botany
& gardening |
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hypertrophy
: a condition of excessive enlargement of a plant organ, to the
detriment of another, as when some part of a plant is invaded by a
fungus parasite, e.g. witches'-broom on cherries (swollen branches),
crown gall in apples (swollen roots), etc. |
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botany
& gardening |
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hypha
(pl. hyphae) : any of the threadlike
parts making up the mycelium of a fungus. |
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botany
& gardening |
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hypocotyl
: the part of the axis, or stem, of a plant embryo or seedling below
the cotyledons (first leaves). |
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botany
& gardening |
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hypogenous
(hypogeal) : growing upon the underside of anything;
developing underground; growing beneath (opposed to 'epigenous') |
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physiology |
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hypothermia
: abnormally low body temperature (below 95oF). Warning
signs include uncontrollable shivering, memory loss, disorientation,
incoherence, slurred speech, drowsiness, and apparent exhaustion.
Medical attention is needed immediately. If it is not available,
begin warming the body slowly. |
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hypothesis : |
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