{ } a. [ L. anatomicus, Gr. &unr_;: cf. F. anatomique. See Anatomy. ] Of or relating to anatomy or dissection; as, the anatomic art; anatomical observations. Hume. [ 1913 Webster ]

adv. In an anatomical manner; by means of dissection. [ 1913 Webster ]

{ } 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 system which, assuming that atoms are endued with gravity and motion, accounted thus for the origin and formation of all things. This philosophy was first broached by Leucippus, was developed by Democritus, and afterward improved by Epicurus, and hence is sometimes denominated the Epicurean philosophy. --
Atomic theory, or the Doctrine of definite proportions (Chem.), teaches that chemical combinations take place between the supposed ultimate particles or atoms of bodies, in some simple ratio, as of one to one, two to three, or some other, always expressible in whole numbers. --
Atomic weight (Chem.), the weight of the atom of an element as compared with the weight of the atom of hydrogen, taken as a standard. [ 1913 Webster ]

adv. In an atomic manner; in accordance with the atomic philosophy. [ 1913 Webster ]

n. a bomb of great power in which the explosive energy is derived from the nuclear fission of a fissionable material, such as plutonium or uranium-235. It is a type of nuclear weapon. The strength of an atom bomb is measured in kilotons, i.e. the equivalent energy released by explosion of a thousand tons of TNT. The first atomic bomb was manufactured in 1945.
Syn. -- A-bomb, fission bomb. [ PJC ]

n. An atomist. [ R. ] [ 1913 Webster ]

n. Atomism. [ Obs. ] [ 1913 Webster ]

n. [ Cf. F. atomicité. ] (Chem.) Degree of atomic attraction; equivalence; valence; also (a later use) the number of atoms in an elementary molecule. See Valence. [ 1913 Webster ]

a. [ Pref. di- + atomic. ] (Chem.) (a) Containing two atoms. (b) Having two replaceable atoms or radicals. [ 1913 Webster ]

a. [ Hex- + atomic. ] (Chem.) (a) Having six atoms in the molecule. [ R. ] (b) Having six replaceable radicals. [ 1913 Webster ]

a. (Chem. & Physics) Between atoms; situated, or acting, between the atoms of bodies; as, interatomic forces. [ 1913 Webster ]

adv. [ Mon- + atomic. ] (Chem.) (a) Consisting of, or containing, one atom; as, the molecule of mercury is monatomic. (b) Having the equivalence or replacing power of an atom of hydrogen; univalent; as, the methyl radical is monatomic. [ 1913 Webster ]

a. [ Penta- + atomic. ] (Chem.) (a) Having five atoms in the molecule. (b) Having five hydrogen atoms capable of substitution. [ 1913 Webster ]

a. [ Poly- + atomic. ] (Chem.) (a) Having more than one atom in the molecule; consisting of several atoms. (b) Having a valence greater than one. [ Obs. ] [ 1913 Webster ]

a. [ Tetra- + atomic. ] (Chem.) (a) Consisting of four atoms; having four atoms in the molecule, as phosphorus and arsenic. (b) Having a valence of four; quadrivalent; tetravalent; sometimes, in a specific sense, having four hydroxyl groups, whether acid or basic. [ 1913 Webster ]

a. [ Pref. tri- + atomic. ] (Chem.) (a) Having three atoms; -- said of certain elements or radicals. (b) Having a valence of three; trivalent; sometimes, in a specific sense, having three hydroxyl groups, whether acid or basic; thus, glycerin, glyceric acid, and tartronic acid are each triatomic. [ 1913 Webster ]