释义 |
prosiphon Zool.|prəʊˈsaɪfən| [f. pro-2 1 + siphon.] The primitive siphon in an embryonic ammonite, a kind of ligament attached to the protoconch. Hence proˈsiphonal a., pertaining to the prosiphon.
1890Cent. Dict., Prosiphon, Prosiphonal. 1895Cambr. Nat. Hist. III. 387 The protoconch is present, and contains a prosiphon. |