n. [ AS. æcern, fr. æcer field, acre; akin to D. aker acorn, Ger. ecker, Icel. akarn, Dan. agern, Goth. akran fruit, akrs field; -- orig. fruit of the field. See Acre. ]
The involucre or cup in which the acorn is fixed. [ 1913 Webster ]
a.
n. (Zool.) One of the sessile cirripeds; a barnacle of the genus
n. (Zool.) A name applied to several large fishes of the Mackerel family (
‖n. [ Pref. para- + corolla. ] (Bot.) A secondary or inner corolla; a corona, as of the Narcissus. [ 1913 Webster ]
(Zool.) An acorn barnacle (
‖n. pl. [ NL. See Tetra-, and Corallum. ] (Paleon.) Same as Rugosa. [ 1913 Webster ]