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单词 pentatremite
释义 pentatremite Palæont.|pɛntəˈtriːmaɪt|
Also contracted pentremite.
[ad. mod.L. Pentatrēmītes, f. penta- + Gr. τρῆµα hole, aperture: see -ite1 2.]
An echinoderm of the genus Pentatrēmītes, belonging to the extinct class Blastoidea, allied to the crinoids. So pentatrematoid |-ˈtriːmətɔɪd|, a., belonging to or resembling the Pentatremitidæ, typified by Pentratremites; n. an echinoderm of this family.
1864Webster, Pentremite, a fossil crinoid.1873Dawson Earth & Man vi. 153 One curious group, that of the Pentremites, a sort of larval form.1890Cent. Dict., Pentatrematoid..Pentatremite.
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