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A strong scalpel used in the dissection of joints.

Not possessing a mouth.

A photometer for measuring the brightness of stars.

The determination of the brightness of stars, and also of the sun, moon, and planets. --As`tro*pho`to*met"ric*al (#), a.

Anything extremely small; a particle; a whit. There was not an atom of water. Sir J. Ross.

Of or pertaining to atoms.

In an atomic manner; in accordance with the atomic philosophy.

An atomist. [R.]

Atomism. [Obs.]

Degree of atomic attraction; equivalence; valence; also (a later use) the number of atoms in an elementary molecule. See Valence.

The doctrine of atoms. See Atomic philosophy, under Atomic.

One who holds to the atomic philosophy or theory. Locke.

Of or pertaining to atoms; relating to atomism. [R.] It is the object of the mechanical atomistic philosophy to confound synthesis with synartesis. Coleridge.

The act of reducing to atoms, or very minute particles; or the state of being so reduced.

To reduce to atoms, or to fine spray. The liquids in the form of spray are said to be pulverized, nebulized, or atomized. Dunglison.

One who, or that which, atomizes; esp., an instrument for reducing a liquid to spray for disinfecting, cooling, or perfuming.

The doctrine of atoms. Cudworth.

An atom; a mite; a pigmy.

One who is self-taught. [R.] Young.

Having an inherent power of action or motion. Nothing can be said to be automatic. Sir H. Davy.