asiphonate, a. and n. Zool.
(əˈsaɪfəneɪt)
[f. a- prefix 14 + siphonate.]
A. adj. Having no respiratory siphon. B. n. An acephalous mollusc so characterized.
| 1859 Owen Classif. Mamm. 61 Holostomatous and asiphonate Gastropods. 1879 Le Conte Elem. Geol. 304 Lamellibranchs are divided into Siphonates and Asiphonates. |