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
annulus (plural annuluses or annuli)
A ring- or donut-shaped area or structure.
(geometry) The region in a plane between two concentric circles of different radii.
(topology) Any topological space homeomorphic to the region in a plane between two concentric circles of different radius.
(astronomy) The ring of the sun not covered by the moon in an annular solar eclipse.
(botany) Structure in a fern that consists of differentially thick-walled cells on a sporangium that bend and distort as a result of drying.
(mycology) The membranous remnants of a partial veil which leaves a ring on the stem of a mushroom.
(oil and gas production) The space contained between the centre well bore and any external tubing. Sometimes used for separated gas flow.
• (topological space): cylinder
• (ring-shaped structure): torus
Source: Wiktionary
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
24 June 2025
(noun) very small (to 3 inches) flattened marine fish with a sucking disc on the abdomen for clinging to rocks etc.
The first coffee-house in Mecca dates back to the 1510s. The beverage was in Turkey by the 1530s. It appeared in Europe circa 1515-1519 and was introduced to England by 1650. By 1675 the country had more than 3,000 coffee houses, and coffee had replaced beer as a breakfast drink.
