| E |
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noun
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| echolocation |
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noun
- The use of echoes to detect objects as observed in bats and other natural creatures. Also known as biosonar.
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| Eddy |
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proper noun
- (given name, male), diminutive of Edward.
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| effusion |
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noun
- an outpouring of liquid
- (context, by extension) an outpouring of speech or emotion
- 1930; George S. Kaufman, Morrie Ryskind, Bert Kalmar, Harry Ruby; Animal Crackers, Paramount Pictures
- : Captain Spaulding: My friends, I am highly gratified by this magnificent display of ...
- (medicine) the seeping of fluid into a body cavity; the fluid itself
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| eightfold way |
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noun - (physics) a theory that organizes subatomic particles into octets
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| Einsteinian |
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adjective
- Of or relating to the theory, theories of the Wikipedia:Theoretical physics, theoretical physicist Wikipedia:Albert Einstein, Albert Einstein.
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| elastic |
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noun (countable and uncountable; plural elastics)
- (uncountable) An elastic material used in clothing, particularly in waistbands and cuffs.
- Running shorts use elastic to eliminate the need for a belt.
- (countable) An elastic band.
adjective ((compar) more elastic, (superl) most elastic)
- Capable of stretching; particularly, capable of stretching so as to return to an original shape or size when force is released.
- The rope is somewhat elastic, so expect it to give when you pull on it.
- Made of elastic.
- elastic band
- Of clothing, elasticated.
- (economics) Sensitive to changes in price.
- Demand for entertainment is more elastic than demand for energy.
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| elasticity |
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noun
- (physics)The property by virtue of which a material deformed under the load can regain its original dimensions when unloaded
- (economics)The sensitivity of changes in a quantity with respect to changes in another quantity.
- the quality of being elastic
- adaptability
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| elastic limit |
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noun - (physics) the level of stress at which a solid undergoes a greater change in strain than predicted by Hooke's law; often followed by necking and breaking
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| electromagnetic radiation |
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noun (uncountable)
- Radiation consisting of oscillating electric and magnetic fields in oriented perpendicularly to each other, moving through space.
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| electromagnetic wave |
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noun
- (physics) electromagnetic radiation, such as light and radio waves
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| electron spin resonance |
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noun (Abbreviated as: ESR)
- (physics) The absorption of radiation by species having unpaired electrons when placed in a magnetic field that is used spectroscopically to detect and study free radicals
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| electrostatics |
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noun
- (physics) the branch of physics that deals with static electricity; that is, with the force exerted by an unchanging electric field upon a charged object
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| energy |
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noun (energies)
- The impetus behind all motion and all activity.
- The capacity to do work.
- (context, physics) A quantity that denotes the ability to do work and is measured in a unit dimensioned in mass í� distance²/time² (ML²/T²) or the equivalent.
- Units:
- :SI: joule (J), kilowatt-hour (kW·h)
- :CGS: erg (erg)
- :Customary: foot-pound-force, calorie, kilocalorie (i.e. dietary calories), BTU, liter-atmosphere, ton of TNT
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| energy level |
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noun - (physics) any of the discrete stable energies that a quantum mechanical system (such as the electrons of an atom) can have
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| epoch |
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noun
- A particular period of history, especially one considered remarkable or noteworthy.
- A notable event which marks the beginning of such a period.
- (astronomy) A precise instant of time that is used as a reference point.
- (context, computing, uncountable) January 1, 1970, 00:00:00 GMT
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| equilibrant |
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noun - A force equal to, but opposite of, the resultant sum of vector forces; that force which balances other forces, thus bringing an object to equilibrium.
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| equivalence principle |
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noun
- (physics) any of several principles, in relativity, concerned with the uniformity of physical measurements in different frame of reference, frames of reference
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| erg |
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noun
- The unit of work or energy, being the amount of work done by a dyne working through a distance of one centimeter.
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| ESR |
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initialism
- electron spin resonance
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| evacuate |
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verb (evacuat, es)
- To make empty; to empty out; to remove the contents of; as, to evacuate a vessel or dish.
- Fig.: To make empty; to deprive.
- To remove; to eject; to void; to discharge, as the contents of a vessel, or of the bowels.
- To withdraw from; to quit; to retire from; as, soldiers from a country, city, or fortress
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| evaporable |
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adjective
- capable of evaporation
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| evaporate |
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verb (evaporat, ing)
- The transition from a liquid state into a gaseous state.
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| evaporation |
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noun
- The process of a liquid converting to the gaseous state.
- The process in which all or a portion of liquid (in a container) is turned into vapour, in order to increase the concentration of solid matter in the mixture.
- (context, archaic) That which is evaporated; vapour.
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| evaporimeter |
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noun
- An atmometer
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| event |
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noun
- An occurrence of social or personal importance.
- (physics) A point in spacetime having three spatial coordinates and one temporal coordinate
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| excitation |
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noun - The act of exciting or putting in motion; the act of rousing up or awakening.
- The act of producing excitement (stimulation); also, the excitement produced.
- Physiology. The activity produced in an organ, tissue, or part, such as a nerve cell, as a result of stimulation
- (physics) The change in state as an excited state is formed by the absorption of a quantum of energy
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| excited state |
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noun - (physics) any state of a particle or system of particles that has a higher energy that that of its ground state
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| excursion |
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noun
- a brief recreational trip; a journey out of the usual way
- While driving home I took an and saw some deer.
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| exhaust |
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noun
- System consisting of the parts of an engine through which burned gases or steam are discharged
- The steam let out of a cylinder after it has done its work there.
- The foul air let out of a room through a register or pipe provided for the purpose.
- An exhaust pipe, especially on a motor vehicle.
verb
- To draw or let out wholly; to drain off completely; as, to exhaust the water of a well; the moisture of the earth is exhausted by evaporation.
- To empty by drawing or letting out the contents; as, to exhaust a well, or a treasury.
- To drain, metaphorically; to use or expend wholly, or till the supply comes to an end; to deprive wholly of strength; to use up; to weary or tire out; to wear out; as, to exhaust one's strength, patience, or resources.
- A decrepit, exhausted old man at fifty-five. --Motley.
- To bring out or develop completely; to discuss thoroughly; as, to exhaust a subject.
- (chemistry) To subject to the action of various solvents in order to remove all soluble substances or extractives; as, to exhaust a drug successively with water, alcohol, and ether.
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| extension |
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noun
- The act of extending or the state of being extended; a stretching out; enlargement in breadth or continuation of length; increase; augmentation; expansion.
- That property of a body by which it occupies a portion of space (or time, e.g. "spatiotemporal extension")
- Capacity of a concept or general term to include a greater or smaller number of objects; -- correlative of intension. Synonymous with denotation.
- A written engagement on the part of a creditor, allowing a debtor further time to pay a debt.
- The operation of stretching a broken bone so as to bring the fragments into the same straight line.
- (weightlifting) An exercise in which an arm or leg is straightened against resistance.
- (fencing) A simple offensive action, consisting of extending the weapon arm forward.
- A numerical code used to specify a specific telephone in a telecommunication network.
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