different between annulus vs galerinoid

English

Etymology

Borrowed from Latin annulus.

Noun

annulus (plural annuluses or annuli)

1. A ring- or donut-shaped area or structure.
2. (geometry) The region in a plane between two concentric circles of different radii.
3. (topology) Any topological space homeomorphic to the region in a plane between two concentric circles of different radius.
4. (astronomy) The ring of the sun not covered by the moon in an annular solar eclipse.
5. (botany) Structure in a fern that consists of differentially thick-walled cells on a sporangium that bend and distort as a result of drying.
6. (mycology) The membranous remnants of a partial veil which leaves a ring on the stem of a mushroom.
7. (oil and gas production) The space contained between the centre well bore and any external tubing. Sometimes used for separated gas flow.

Synonyms

• (topological space): cylinder

Hyponyms

• (ring-shaped structure): torus

Related terms

• annular

Derived terms

• annulate
• annulation

Translations

Latin

Pronunciation

• (Classical) IPA^(key): /?a?n.nu.lus/, [?ä?n?????s?]
• (Ecclesiastical) IPA^(key): /?an.nu.lus/, [??n?ulus]

Noun

?nnulus m (genitive ?nnul?); second declension

1. Alternative form of ?nulus

Declension

Second-declension noun.

Descendants

• English: annulus, annulet

References

• annulus in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
• annulus in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
• annulus in William Smith et al., editor (1890) A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin

English

Etymology

This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term.

Adjective

galerinoid (comparative more galerinoid, superlative most galerinoid)

1. (mycology) Having a brittle stem, attached gills and an annulus, but no volva.