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单词 crenation
释义

crenationn.

/kriːˈneɪʃən/
Etymology: < crenate n.: see -ation suffix.
Botany, Zoology, etc.
A crenated formation; a rounded toothing, e.g. on the margin of a leaf or shell; scalloping; a crenature.
ΘΚΠ
the world > life > biology > physical aspects or shapes > indentation or cavity > [noun] > notch or indentation
incision1578
incisure1597
crenature1815
emargination1831
crenel1835
crenation1846
crenulation1846
1846 J. D. Dana U.S. Exploring Exped.: Zoophytes 490 The polyps..have twelve short tentacles..in some species they are mere crenations to the disk.
1875 H. C. Wood Treat. Therapeutics (1879) 317 A well-marked stellar crenation.
1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 376 In many teeth and crenations of the leaf.
This entry has not yet been fully updated (first published 1893; most recently modified version published online March 2019).
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n.1846
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