umbonationn.

Etymology: Compare umbonate adj. and -ation suffix.Previous versions of the OED give the stress as: umboˈnation.

rare.

A formation of the nature of an umbo.

ΘΚΠ

the world > space > shape > unevenness > projection or prominence > protuberance or rounded projection > [noun] > a protuberance or protuberant part > knob

knob?a1425

knottle?a1500

bob1601

node1681

nub1696

umbo1753

button1758

knule1824

onion1825

umbonation1872

1872 H. C. Wood Contrib. Hist. Freshwater Algæ (1874) 101 Tubercles, obtuse or sharp simple or forked spines, hair-like processes, umbonations, &c.

This entry has not yet been fully updated (first published 1921; most recently modified version published online June 2021).

单词	umbonation
释义	umbonationn. Etymology: Compare umbonate adj. and -ation suffix.Previous versions of the OED give the stress as: umboˈnation. rare. A formation of the nature of an umbo. ΘΚΠ the world > space > shape > unevenness > projection or prominence > protuberance or rounded projection > [noun] > a protuberance or protuberant part > knob knob?a1425 knottle?a1500 bob1601 node1681 nub1696 umbo1753 button1758 knule1824 onion1825 umbonation1872 1872 H. C. Wood Contrib. Hist. Freshwater Algæ (1874) 101 Tubercles, obtuse or sharp simple or forked spines, hair-like processes, umbonations, &c. This entry has not yet been fully updated (first published 1921; most recently modified version published online June 2021). < n.1872
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