ANNULI
ANNULUS
annulus, skirt
(noun) (Fungi) a remnant of the partial veil that in mature mushrooms surrounds the stem like a collar
ring, halo, annulus, doughnut, anchor ring
(noun) a toroidal shape; “a ring of ships in the harbor”; “a halo of smoke”
Source: WordNet® 3.1
Noun
annuli
plural of annulus
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Source: Wiktionary
ANNULUS
An"nu*lus, n.; pl. Annuli. Etym: [L.]
1. A ring; a ringlike part or space.
2. (Geom.)
(a) A space contained between the circumferences of two circles, one
within the other.
(b) The solid formed by a circle revolving around a line which is the
plane of the circle but does not cut it.
3. (Zoöl.)
Definition: Ring-shaped structures or markings, found in, or upon, various
animals.
Source: Webster’s Unabridged Dictionary 1913 Edition