DICT.TW Dictionary Taiwan

 specific gravity 名詞
 比重

 spe·cif·ic a.
 1. Of or pertaining to a species; characterizing or constituting a species; possessing the peculiar property or properties of a thing which constitute its species, and distinguish it from other things; as, the specific form of an animal or a plant; the specific qualities of a drug; the specific distinction between virtue and vice.
    Specific difference is that primary attribute which distinguishes each species from one another.   --I. Watts.
 2. Specifying; definite, or making definite; limited; precise; discriminating; as, a specific statement.
 3. Med. Exerting a peculiar influence over any part of the body; preventing or curing disease by a peculiar adaptation, and not on general principles; as, quinine is a specific medicine in cases of malaria.
    In fact, all medicines will be found specific in the perfection of the science.   --Coleridge.
 Specific character Nat. Hist., a characteristic or characteristics distinguishing one species from every other species of the same genus.
 Specific disease Med. (a) A disease which produces a determinate definite effect upon the blood and tissues or upon some special tissue. (b) A disease which is itself uniformly produced by a definite and peculiar poison or organism.
 Specific duty. Com. See under Duty.
 Specific gravity. Physics See under Gravity.
 Specific heat Physics, the quantity of heat required to raise the temperature of a body one degree, taking as the unit of measure the quantity required to raise the same weight of water from zero to one degree; thus, the specific heat of mercury is 0.033, that of water being 1.000.
 Specific inductive capacity Physics, the effect of a dielectric body in producing static electric induction as compared with that of some other body or bodies referred to as a standard.
 Specific legacy Law, a bequest of a particular thing, as of a particular animal or piece of furniture, specified and distinguished from all others. --Wharton. --Burrill.
 Specific name Nat. Hist., the name which, appended to the name of the genus, constitutes the distinctive name of the species; -- originally applied by Linnaeus to the essential character of the species, or the essential difference.  The present specific name he at first called the trivial name.
 Specific performance Law, the peformance of a contract or agreement as decreed by a court of equity.
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 Grav·i·ty n.; pl. Gravities
 1. The state of having weight; beaviness; as, the gravity of lead.
 2. Sobriety of character or demeanor. “Men of gravity and learning.”
 3. Importance, significance, dignity, etc; hence, seriousness; enormity; as, the gravity of an offense.
    They derive an importance from . . . the gravity of the place where they were uttered.   --Burke.
 4. Physics The tendency of a mass of matter toward a center of attraction; esp., the tendency of a body toward the center of the earth; terrestrial gravitation.
 5. Mus. Lowness of tone; -- opposed to acuteness.
 Center of gravity See under Center.
 Gravity battery, See Battery, n., 4.
 Specific gravity, the ratio of the weight of a body to the weight of an equal volume of some other body taken as the standard or unit. This standard is usually water for solids and liquids, and air for gases. Thus, 19, the specific gravity of gold, expresses the fact that, bulk for bulk, gold is nineteen times as heavy as water.
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 specific gravity
      n : the density of a substance relative to the density of water