a. rare. [f. Gr. τριπλάσι-ος three times as much or as many, threefold + -AN.] Threefold, triple. So Triplasic a. in same sense; Triplasy (see quot. 1900).
1678. Cudworth, Intell. Syst., I. iv. 288. The Persian Magi to this very day, celebrate a Festival Solemnity in honour of the Triplasian (that is, the Three-fold or Triplicated) Mithras. Ibid., 290. The Persian Trinity (or Triplasian Deity).
1816. G. S. Faber, Orig. Pagan Idol., II. 415. The triplasian Mithras.
1864. J. Hadley, Ess., v. (1873), 98. Beside these three ratios of arsis and thesis,… Aristoxenus mentions two others: the triplasic, in which the two parts of the foot are as 3 to 1 [etc.].
1900. B. D. Jackson, Gloss. Bot. Terms, Triplasy..., the division of an organ into three analogous structures (Fermond).
