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  earth : loose material composed of disintegrated Earth’s solid components; synonym: soil.


  Earth : the third planet in the solar system, lying between Venus and Mars.
    Easter : an annual Christian festival in commemoration of the resurrection of Jesus Christ, observed on the first Sunday after the first full moon after the vernal equinox, as calculated according to tables based in Western churches on the Gregorian calendar and in Orthodox churches on the Julian calendar. Also called Easter Sunday, the day on which this festival is celebrated.

Latin                    abbreviation

  e.g. : exempli gratia : for example
    ecosystem : ecological system : a dynamic complex of biotic communities (plant, animal and micro-organism) and their abiotic environment (water, soil) interacting as a functional unit to comprise and govern the behavior of some defined subset of the biosphere.

game : chess

  Elo rating : an internationally accepted statistical system for ranking chess players, created by Arpad Elo in 1960 and adopted by FIDE in 1970; it is a numerical representation of a player's success rate and approximation of strength. International Grandmasters are typically in the range 2500 to 2700, world champions often over 2700; many games must be played before an Elo rating can be estimated with confidence. Obviously, two players with the same rating should have an equal chance of winning against each other. Less obviously, the same rating difference implies the same chance of winning: a player rated 2400 playing against a player rated 2200 has the same chance of winning as a 1400 against a 1200. The Elo rating is the foundation for the award of FIDE titles.


publishing & printing

  em : in typesetting, a unit of linear measurement equal to the point size of the type in question; e.g. a 6 point em is 6 points wide; within a font of type of one size the typesetter commonly measures by ems, e.g. in 9 point matter, to mark the copy for 1 em paragraph indention means that each paragraph should be indented 9 points.

geography : toponym

  Embarcadero : the Spanish term for a boat landing (from embarcar - to embark) was commonly used in Spanish times of the southwestern US and has survived in a number of places.
    emigration : ex(out of)-migration; leaving one's native country to settle abroad.

botany & gardening

  endocarp (also: apicarp) : the inner layer of the pericarp, as the stone of certain fruits.

botany & gardening

  endogen : any plant that grows by adding tissue irregularly throughout the stem; so called because the stems were formerly believed to grow from within.


  endogenous : growing or developing from or on the inside.


  Eng. : English
    engine : a device which produces an output different from a given input; in that broad meaning, the term engine encompasses mechanical engines (which convert energy of a fuel or some type of mechanical motion into energy of the desired mechanical motion, e.g. steam engine or combustion engine) as well as computing engines (which convert input data into the desired output data, e.g. search engine or rendering engine).
    enigma : a perplexing, baffling, or seemingly inexplicable matter, statement, person, etc.; something very difficult to understand.

physical quantity     symbol:  H

SI units:      [H] = J/mol


enthalpy  : a thermodynamic quantity equal to sum of the internal energy  (U) plus external energy, i.e. the product of its volume (V) and pressure (P), of a thermodynamic system:

H = U + P V

Enthalpy is the amount of energy in a system capable of doing mechanical work: it is defined so that changes in enthalpy are equal to the heat absorbed or released by a process running at constant pressure;  changes in enthalpy can be measured using calorimetry.
Synonyms: heat content, total heat, heat of formation.

internal energy


  entrepreneur : an economic agent who perceives market opportunities and assembles the factors of production to exploit them.

factors of production

botany & gardening

  epicalyx : a calyx outside the true calyx - the calyx thus appears to be composed of two whorls.

botany & gardening

  epicarp (or exocarp) : the outermost layer of the pericarp, often different in texture from the rest, as the rind or peel of certain fruits.

botany & gardening

  epigenous : growing on the surface, especially upper surface, as fungi on leaves.

botany & gardening

  epigynous : (of flowers) having all floral parts conjoint and generally divergent from the ovary at or near its summit; having sepals, petals, and stamens growing above the ovary; in this flower the ovary is called inferior.

botany & gardening

  epiphyte : a plant that grows above the ground upon another plant without deriving any nourishment from it, e.g. ferns, mosses, and some orchids; an epiphyte derives its nutrients and water from rain, the air, dust, etc.


  epistemology : the branch of philosophy that deals with the nature, origin and scope of knowledge.
    equinox : the time when Sun crosses the plane of Earth's equator, making night and day of approximately equal length all over Earth and occurring about March 21 (vernal equinox or spring equinox) and September 22 (autumnal equinox).

Latin                    abbreviation

et all. : et alii : and others

Latin                    abbreviation

etc. : et cetera : and so forth

Latin                    abbreviation

et seq. : et sequentes : and the following


  etymology : an account of the origin and development (derivation) of a word and its meaning; the study of words and their origins.

Latin                             prefix

ex- : prefix of the meaning 'former' (as in ex-president) and 'outside' or 'out of' (as in exodus).

botany & gardening

exfoliating : peeling off in thin layers, as the bark of a birch or plane tree.

UPDATED : 2007-04-12

WEBSITE  EDITOR : Krešimir J. Adamić