a. Also 8 æquidifferent. [f. EQUI- + DIFFERENT.]
1. Having equal differences; arithmetically proportional.
1695. Halley, Easy Demonstr. Log. Tangents, in Misc. Cur. (1708), II. 31. The Secants of æquidifferent Arches.
1827. Hutton, Course Math., I. 227. A Series of equidifferent Terms.
2. Said of a crystal in which the numbers of the faces presented severally by the prism and by each summit, form a series in arithmetical progression, as 6, 4, 2.
1817. R. Jameson, Char. Min., 208. Equidifferent basaltic hornblend is a six-sided prism.
