Atomic weight

Atomic weight
Weight Weight, n. [OE. weght, wight, AS. gewiht; akin to D. gewigt, G. gewicht, Icel. v[ae]tt, Sw. vigt, Dan. v[ae]gt. See {Weigh}, v. t.] [1913 Webster] 1. The quality of being heavy; that property of bodies by which they tend toward the center of the earth; the effect of gravitative force, especially when expressed in certain units or standards, as pounds, grams, etc. [1913 Webster]

Note: Weight differs from gravity in being the effect of gravity, or the downward pressure of a body under the influence of gravity; hence, it constitutes a measure of the force of gravity, and being the resultant of all the forces exerted by gravity upon the different particles of the body, it is proportional to the quantity of matter in the body. [1913 Webster]

2. The quantity of heaviness; comparative tendency to the center of the earth; the quantity of matter as estimated by the balance, or expressed numerically with reference to some standard unit; as, a mass of stone having the weight of five hundred pounds. [1913 Webster]

For sorrow, like a heavy-hanging bell, Once set on ringing, with his own weight goes. --Shak. [1913 Webster]

3. Hence, pressure; burden; as, the weight of care or business. ``The weight of this said time.'' --Shak. [1913 Webster]

For the public all this weight he bears. --Milton. [1913 Webster]

[He] who singly bore the world's sad weight. --Keble. [1913 Webster]

4. Importance; power; influence; efficacy; consequence; moment; impressiveness; as, a consideration of vast weight. [1913 Webster]

In such a point of weight, so near mine honor. --Shak. [1913 Webster]

5. A scale, or graduated standard, of heaviness; a mode of estimating weight; as, avoirdupois weight; troy weight; apothecaries' weight. [1913 Webster]

6. A ponderous mass; something heavy; as, a clock weight; a paper weight. [1913 Webster]

A man leapeth better with weights in his hands. --Bacon. [1913 Webster]

7. A definite mass of iron, lead, brass, or other metal, to be used for ascertaining the weight of other bodies; as, an ounce weight. [1913 Webster]

8. (Mech.) The resistance against which a machine acts, as opposed to the power which moves it. [Obs.] [1913 Webster]

{Atomic weight}. (Chem.) See under {Atomic}, and cf. {Element}.

{Dead weight}, {Feather weight}, {Heavy weight}, {Light weight}, etc. See under {Dead}, {Feather}, etc.

{Weight of observation} (Astron. & Physics), a number expressing the most probable relative value of each observation in determining the result of a series of observations of the same kind. [1913 Webster]

Syn: Ponderousness; gravity; heaviness; pressure; burden; load; importance; power; influence; efficacy; consequence; moment; impressiveness. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Atomic weight — (symbol: A sub|r) is a dimensionless physical quantity, the ratio of the average mass of atoms of an element (from a given source) to 1/12 of the mass of an atom of carbon 12.cite journal | author = International Union of Pure and Applied… …   Wikipedia

  • Atomic weight — Atomic A*tom ic, Atomical A*tom ic*al, a. [Cf. F. atomique.] 1. Of or pertaining to atoms. [1913 Webster] 2. Extremely minute; tiny. [1913 Webster] {Atomic bomb}, see {atom bomb} in the vocabulary. {Atomic philosophy}, or {Doctrine of atoms}, a… …   The Collaborative International Dictionary of English

  • atomic weight — n. Chem. the weight of one atom of an element expressed in atomic mass units: it is the average weight of all the isotopes of the element …   English World dictionary

  • atomic weight — n the mass of one atom of an element specif the average mass of an atom of an element as it occurs in nature that is expressed in atomic mass units see ELEMENT (table) * * * the sum of the masses of the constituents of an atom, either that of a… …   Medical dictionary

  • atomic weight — Chem. the average weight of an atom of an element, formerly based on the weight of one hydrogen atom taken as a unit or on 1/16 the weight of an oxygen atom, but after 1961 based on 1/12 the weight of the carbon 12 atom. Abbr.: at. wt. [1820 30]… …   Universalium

  • atomic weight — noun (chemistry) the mass of an atom of a chemical element expressed in atomic mass units • Syn: ↑atomic mass, ↑relative atomic mass • Topics: ↑chemistry, ↑chemical science • Hypernyms: ↑ …   Useful english dictionary

  • atomic weight — noun a) Former term for the more specific relative atomic mass. The equivalent weight of an element or compound is that weight equivalent in reactive power to one atomic weight of hydrogen. b) A term used to represent the mean relative atomic… …   Wiktionary

  • atomic weight — UK / US noun [countable/uncountable] Word forms atomic weight : singular atomic weight plural atomic weights chemistry relative atomic mass …   English dictionary

  • atomic weight — santykinė atominė masė statusas T sritis Standartizacija ir metrologija apibrėžtis Cheminio elemento vidutinės masės ir nuklido ¹²C atomo masės 1/12 dalies dalmuo. atitikmenys: angl. atomic mass; atomic weight; relative atomic mass vok. Atommasse …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • atomic weight — santykinė atominė masė statusas T sritis Standartizacija ir metrologija apibrėžtis Vidutinės elemento atomų masės ir 1/12 nuklido ¹²C atomo masės dalmuo. atitikmenys: angl. atomic mass; atomic weight; relative atomic mass vok. Atommasse, f;… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”