noun, plural an·nu·li [an-yuh-lahy] /ˈæn yəˌlaɪ/, an·nu·lus·es.
- annulus hemorrhoidalis,
- annulus urethralis,
Origin of annulus
Examples from the Web for annulus
The capsule (fig. 18) is oblong, the ring or annulus remaining for some time.An Elementary Text-book of the Microscope|John William Griffith
The annulus is very small and fugacious, being little more than the abrupt termination to the coating of the stem.The Mushroom, Edible and Otherwise|M. E. Hard
Ring: a circle or annulus, usually margining a discolored spot.Explanation of Terms Used in Entomology|John. B. Smith
That part of the veil which breaks away from the cap, called the secondary veil, forms the annulus or ring.Among the Mushrooms|Ellen M. Dallas and Caroline A. Burgin
The annulus is membranaceous, large, and hangs like a broad collar from the upper part of the stem.Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.|George Francis Atkinson
noun plural -li (-ˌlaɪ) or -luses
Word Origin for annulus
1560s, medical, from misspelling of Latin anulus "little ring, finger ring," a diminutive of anus (see anus).