“abactinal”的英文意思_释义_用法

单词

abactinal

释义

abactinal, a. Zool.|ˌæbækˈtaɪnəl, ˌæbˈæktɪnəl|
[f. L. ab away from + actinal.]
Remote from the actinal area; pertaining to that part of the surface of a radiated animal which is opposite to the mouth, e.g. the apex of a sea-urchin, or upper surface of a star-fish. See actinal.
1857L. Agassiz Contrib. Nat. Hist. America IV. 376 I have called this side..the oral or actinal area, and the opposite side the aboral or abactinal area.1864A. Agassiz in Reader No. 85, 204/2 The spines on the abactinal area.1881Mackintosh in Nature No. 628, 41 The abactinal system and ambulacral plates of a Cidarid combined with the thin test and hollow spines of a Diadema.

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