annulus in Chinese

annulus in Chinese is 戒指, 环, 冠冕 — annulus means a shape or object like a ring, with an open space in the middle.

annulus in Chinese

戒指

noun

Pronounced: jiè zhi

A ring- or donut-shaped area, object, or structure.

环

noun

Pronounced: huán

(astronomy) A ring of light in a celestial body, especially when caused by an annular eclipse (for example, when the Sun and Moon are in line with the Earth, but the Moon does not completely cover the Sun's disc).

冠冕

noun

Pronounced: guān miǎn

(botany) A structure surrounding a sporangium (or part of it) which shrinks and causes it to rupture for spore dispersal; specifically, in a fern: a structure around about two-thirds of the sporangium consisting of differentially thick-walled cells which dry and distort the sporangium; and in a moss: a complete ring of cells around the tip of the sporangium which dissolves to cause the tip to detach.

What does "annulus" mean?

noun A shape or object like a ring, with an open space in the middle.
noun (anatomy) A ring of tough tissue, especially the one around a heart valve opening that its flaps and muscles attach to.
noun A bright ring of light around a dark body in the sky, as seen for example when the Moon passes in front of the Sun but does not fully cover it.
noun A part around a fern or moss spore case that shrinks and splits it open to release the spores.