英语词汇“annulus”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

an·nu·lus

(ănyə-ləs)

n. pl. an·nu·lus·es or an·nu·li (-lī′)

1. A ringlike figure, part, structure, or marking, such as a growth ring on the scale of a fish.

a. A ring or group of thick-walled cells around the sporangia of many ferns that functions in spore release.

b. The ringlike remains of a broken partial veil, found around the stipes of certain mushrooms.

3. Mathematics The figure bounded by and containing the area between two concentric circles.

[Latin ānulus, ring, diminutive of ānus.]

单词	annulus
释义	an·nu·lus (ănyə-ləs) n. pl. an·nu·lus·es or an·nu·li (-lī′) 1. A ringlike figure, part, structure, or marking, such as a growth ring on the scale of a fish. 2. a. A ring or group of thick-walled cells around the sporangia of many ferns that functions in spore release. b. The ringlike remains of a broken partial veil, found around the stipes of certain mushrooms. 3. Mathematics The figure bounded by and containing the area between two concentric circles. [Latin ānulus, ring, diminutive of ānus.]
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