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protosiphon
protosiphon n.
Brit. 
/ˌprəʊtə(ʊ)ˈsʌɪfn/
, /ˌprəʊtə(ʊ)ˈsʌɪfn/U.S. /ˌproʊdoʊˈsaɪf(ə)n/
Zoology rare the siphuncle in the protoconch of some cephalopod molluscs./ˌproʊdoʊˈsaɪf(ə)n/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.
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as lemmas
- the pity is
- the plague
- the plainness
- the plains
- the play of love
- the pleasures of the table
- the plot thickens
- the point
- the point device
- the point where
- the polite world
- the politics
- the pomps and vanities of this wicked world
- the pool of london
- the pornography of violence
- the possessive
- the pot calls the kettle black
- the pot goes so long to the water that it is broken at last
- the pot goes so often to the water that it is broken at last
- the pot walks
- the potato
- the power five
- the power of five
- the power of imperation
- the powers that be