noun (plural annuli /-ˌlī/)technical
A ring-shaped object, structure, or region.
- Channel incorporation was typically achieved within a few minutes after ‘brushing’ the membrane fraction across the annulus with fresh lipids to form a new bilayer.
- The tympanic annulus must be completely visible.
- The fibrillar collagens also change across the disc, with the nucleus containing only type II collagen while both types I and type II are found in the annulus.
Mid 16th century: from Latin anulus, annulus.
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