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单词 annulation
释义

annulationn.

/ænjuːˈleɪʃən/
Etymology: n. of action < annulate adj.
The formation of rings or ring-like divisions; concr. a ring-like structure, a ring.
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > [noun] > annulose animals > structure of
annulation1829
annulism1841
1829 E. Jesse Jrnl. Naturalist 332 The whole body of the animal [hairworm] consists of numerous annulations.
1870 G. Rolleston Forms Animal Life Introd. 123 Their [worms'] bodies are..divided externally by annulation.
1872 H. A. Nicholson Man. Palæontol. 271 The walls of the shell are..surrounded with numerous thickened rings or annulations.
This entry has not yet been fully updated (first published 1884; most recently modified version published online June 2011).
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