“sicula”的英文意思_释义_用法

单词

sicula

释义

sicula Palæont.|ˈsɪkjuːlə|
[a. L. sīcula, dim. of sīca curved dagger.]
The small conical or dagger-shaped structure secreted by and containing the initial member of a colony of graptolites.
1893Lunds Univ. Årsskrift XXIX. xii. 3 The sicula is seen to project from the right side obliquely upwards towards the median groove, thus separating the rounded bases of the two moieties of the rhabdosoma.1910[see rhabdosome s.v. rhabdo].1970R. M. Black Elements Palaeont. xiv. 211 The sicula was secreted by the first members (a zooid) of the colony and the thecae were formed by the subsequent zooids by a process of budding.

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