a. Obs. [ad. rare L. tōph-, tōfōsus, f. TOPHUS, tōfus: see -OUS.] Of the nature of a stony or calcareous concretion: a. in the body. b. in deposits from springs, etc. (cf. next).
1634. T. Johnson, Parey’s Chirurg., XIX. iii. (1678), 432. You shall find them [pustules] stuffed with a certain plaister-like and tophous matter.
1692. Ray, Disc., 110. Now these Teeth being burnt, pass presently into a Coal, but the tophous substance adhering to them, doth not so.
1699. Misaurus, Hon. Gout (1720), 8. And threw off the tophous Injury.
1754–64. Smellie, Midwif., II. 79. Bones … perfectly sound with a few spots of tophous concretions on them.
1756. C. Lucas, Ess. Waters, II. 141. A … petrifying incrusting or tophous water, which rises in several large springs.
