noun

1. The amount of energy imparted by nuclear (or ionizing) radiation to unit mass of absorbing material. The unit is the rad.

noun

1. One who, or that which, absorbs.

noun

1. The act or process of absorbing or sucking in anything, or of being absorbed and made to disappear; as, the absorption of bodies in a whirlpool, the absorption of a smaller tribe into a larger.
2. (context, chemistry, physics) An imbibing or reception by molecular or chemical action; as, the absorption of light, heat, electricity, etc.
3. (physiology) In living organisms, the process by which the materials of growth and nutrition are absorbed and conveyed to the tissues and organs.
4. Entire engrossment or occupation of the mind; as, absorption in some employment.

noun

1. (physics),(chemistry) one of any number of ranges of wavelengths of electromagnetic radiation absorbed by a substance

noun (absorptiviti, es)

1. The quality of being absorptive; absorptiveness.

noun Often used adjectivally

1. One who, or that which, accelerates.
2. A device for causing acceleration.
3. A substance which speeds up chemical reactions.
4. accelerator pedal.

noun

1. An instrument for measuring acceleration

noun

1. One who accepts.
2. (context, In law and commerce) one who accepts a draft or a bill of exchange; a drawee after he has accepted.
3. (chemistry) an atom or molecule which can accept an electron to form a chemical bond.
4. (physics) a chemical acceptor atom forming a positive hole in a semiconductor.

noun

1. One versed in acoustics, especially a physicist who specializes in acoustics

noun See -ics regarding the treatment of such nouns as singular.

1. The quality of a space for doing music.

Until they discovered the non-contractual concrete slab under the stage floor, everyone at Carnegie Hall wondered, since the renovations, why the had changed.

1. (physics) The science of sounds, teaching their nature, phenomena, and laws.

Acoustics, then, or the science of sound, is a very considerable branch of physics. - Sir John Herschel.

adjective

1. Of, or relating to actinism

verb (adher, ing)

1. (intransitive) To stick fast or cleave
   1. etymology 2 , cleave, as a glutinous substance does; to become joined or united; as, wax to the finger; the lungs sometimes adhere to the pleura.
   2. (intransitive) To hold, be attached, or devoted; to remain fixed, either by personal union or conformity of faith, principle, or opinion; as, men adhere to a party, a cause, a leader, a church.
   3. (intransitive) To be consistent or coherent; to be in accordance; to agree.

noun

1. The ability of a substance to stick to an unlike substance.
2. A feeling of attachment (e.g. an infant to its parents).
3. An agreement to adhere
4. (medicine) An abnormal union of surface by the formation of new tissue resulting from an inflammatory process.

noun

1. A substance, such as glue, that provides or promotes adhesion.

adjective

1. sticky, Sticky; tenacious, as glutinous substances.
2. apt, Apt or tending to adhere; clinging.

noun

1. an instrument used to demonstrate the force at which heated vapour escapes from a vessel through a narow aperture

verb (aerates, aerating, aerated)

1. To supply oxygen or air.

noun

1. An instrument used to measure the mass and density of gases

noun

1. atmospheric pressure

verb

1. (past of, allow)

noun

1. A positively charged nucleus of a helium-4 atom (consisting of two protons and two neutrons), emitted as a consequence of radioactivity.

noun

1. a stream of alpha particles.

noun

1. the measure of something's size; magnitude
2. (mathematics) the maximum absolute value of the vertical component of a periodic curve
3. (physics) the maximum absolute value of some quantity that varies periodically

noun

1. (context, anatomy) A bone in the base of the lower jaw of many birds, reptiles, and fishes.

adjective

1. Relating to an angle or to angles; having an angle or angles; forming an angle or corner; sharp-cornered; pointed; as, an angular figure.
2. Measured by an angle; as, angular distance.
3. (Figurative) Lean; lank; raw-boned; ungraceful; sharp and stiff in character; as, remarkably angular in his habits and appearance; an angular female.

noun

1. (classical mechanics) The rate of change of angular velocity, often represented by α.

noun

1. (math) (physics) The angle travelled, in a given time, by a body rotating about an axis, the rate of motion through an angle.

adjective

1. Perturbed harmonic.
   

   An anharmonic oscillator is a perturbed version of a harmonic oscillator.

adjective

1. (physics) Having properties that differ according to the direction of measurement; exhibiting anisotropy.

The crystal has an structure, as it is stronger along its length than laterally.

noun

1. (physics) a positron

noun (uncountable)

1. (physics) Matter that is composed of the antiparticles of those that constitute normal matter.

adjective (no comparative or superlative)

1. Consisting of antimatter.

noun

1. the antiparticle of the neutrino

noun

1. (physics) The antiparticle corresponding to a neutron

noun

1. (physics) a region of maximum amplitude situated between adjacent nodes of a vibrating body, such as a string

noun

1. (particles) A subatomic particle corresponding to another particle with the same mass, spin and mean lifetime but with charge, parity, strangeness and other quantum numbers flipped in sign.

noun

1. The antiparticle of the proton, having a negative electric charge

noun

1. (particles) the antiparticle of a quark

noun

1. An instrument that measures the rate of evaporation of a liquid

noun (wikipedia, atmosphere, Atmosphere (layer of gases))

1. The gases surrounding the Earth or any astronomical body.
2. The air in a particular place.
3. The mood or feeling in a situation.

adjective

1. Of, or relating to atoms

1. • A stream of hydrogen is emitted
     1. Of, or employing nuclear energy or processes
   • We built a small bomb in the garage
     1. Infinitesimally small
   • The hairs on a bedbug are almost
     1. Unable to be split or made any smaller
   • A bit is an item of data

noun

1. (chemistry) a unit of mass equal to 1/12 the mass of an atom of the ¹²C isotope of carbon

noun

1. (quantum), (chemistry) The quantum mechanical behaviour of an electron in an atom describing the probability of the electron's particular position and energy.
2. A particular atomic orbital associated with a given set of quantum numbers.

noun

1. (physics) an early nuclear reactor fuelled by uranium and moderated with graphite

verb to atomize

1. to separate into atoms
2. to make into a fine spray
3. to fragment (can be used metaphorically)
4. to bomb with nuclear weapons

noun

1. A gradual diminishing in the strength of something

1. (physics) A reduction in the level of some property with distance, especially the amplitude of a wave or the strength of a signal
   
2. (biology) A weakening in the virulence of a pathogen or other microorganism
   
3. (botany) The tapering of a leaf etc to a fine point
   
4. (engineering) A fabrication process in which a material is stretched out into a thin shape

verb

1. To pull toward without touching

A magnet attracts iron filings

1. To arouse interest or desire

Advertising is designed to attract customers

1. To bring upon oneself

Bizarre behavior is sure to attract attention

noun

1. The tendency to attract

The Moon is held in its orbit by the attraction of the Earth's gravity

1. The feeling of being attracted

I felt a strange attraction towards the place

1. An event or location that has a tendency to attract visitors

The new mall should be a major attraction

noun

1. A large mass or body of snow and ice sliding swiftly down a mountain side, or falling down a precipice.
2. A fall of earth, rocks, etc., similar to that of an avalanche of snow or ice.
3. A sudden, great, or irresistible descent or influx of anything.