单词 | protosiphon |
释义 | > as lemmasprotosiphon protosiphon n. Brit. /ˌprəʊtə(ʊ)ˈsʌɪfn/ , U.S. /ˌproʊdoʊˈsaɪf(ə)n/ Zoology rare the siphuncle in the protoconch of some cephalopod molluscs.ΚΠ 1890 Cent. Dict. Protosiphon, the representative or origin of the siphuncle in the protoconch of ammonitoid cephalopods. a1933 J. A. Thomson Biol. for Everyman (1934) I. xv. 411 (caption) Section of the Shell of Spirula... PROT, protoconch; PROS, protosiphon. < as lemmas |
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