a. Bot. [f. prec. + -ATE2 2. Cf. F. calyptré.] Having a calyptra, hood or covering; hooded, operculate.
1830. Lindley, Nat. Syst. Bot., 273. Each fibre of the roots has a calyptrate covering at the extremity. Ibid. (1835), Introd. Bot. (1848), I. 327. The calyx is … calyptrate, if at the period of falling it bursts on one side, as in Eschscholtzia.
