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单词 exannulate
释义

exannulateadj.

/ɛksˈanjʊlət/
Etymology: < ex- prefix1 privative + -annul- (in annulus n.) + -ate suffix2.
Botany.
Having no annulus or ring round the sporangium, as certain ferns; opposed to annulate adj.
ΚΠ
1861 R. Bentley Man. Bot. i. v. 369 Those in which it is absent are exannulate.
1880 A. Gray Struct. Bot. x. §2. 361 Not dehiscent, exannulate.
This entry has not yet been fully updated (first published 1894; most recently modified version published online June 2018).
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adj.1861
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