Found 2 items, similar to molecule.
English → English (WordNet) Definition: molecule molecule n 1: (physics and chemistry) the simplest structural unit of an element or compound 2: (nontechnical usage) a tiny piece of anything [syn: atom, particle, corpuscle, mote, speck]
English → English (gcide) Definition: Molecule Molecule \Mol"e*cule\, n. [Dim. fr. L. moles a mass: cf. F. mol['e]cule. See 3d Mole.] 1. One of the very small invisible particles of which all ordinary matter is supposed to consist. [1913 Webster] 2. (Physics) The smallest part of any substance which possesses the characteristic properties and qualities of that substance, and which can exist alone in a free state. [1913 Webster] 3. (Chem.) A group of atoms so united and combined by chemical affinity that they form a complete, integrated whole, being the smallest portion of any particular compound that can exist in a free state; as, a molecule of water consists of two atoms of hydrogen and one of oxygen. Cf. Atom. [1913 Webster]