a. [f. as prec. + -ICAL.]
1. Concerned with atoms; = ATOMIC a. 2, 3.
1664. Power, Exp. Philos., I. 57. The Controversie twixt the Peripatetick and Atomical Philosophers.
1866. Ferrier, Lect. Grk. Philos., I. viii. 170. Doctrines of the Atomical philosophers.
2. Of or pertaining to atoms; = ATOMIC a. 1.
1660. Ingelo, Bentiv. & Ur. (1682), II. 206. The parts of this Atomical Composition still marching away, and other succeeding in their rooms.
1836. Todd, Cycl. Anat. & Phys., I. 58/2. The microscopical and atomical structure of fat.
3. Tiny, very minute.
1646. Sir T. Browne, Pseud. Ep., 53. Their powders and Atomicall divisions.
1752. Lisle, Observ. Husb., 11. Minute, atomical, imperceptible bodies.