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单词 prosiphon
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.
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