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annulus (n.)
1560s in medical use, "ring-like area or space," from a Medieval Latin misspelling of Latin anulus "little ring, finger ring," a diminutive of anus "ring" (see anus).
updated on January 15, 2017
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Definitions of annulus from WordNet
Dictionary entries near annulus
Annuit Coeptis
annuity
annul
annular
annulment
annulus
annunciate
annunciation
annus mirabilis
anode
anodize