noun. (Fungi) a remnant of the partial veil that in mature mushrooms surrounds the stem like a collar.
noun. a toroidal shape.
1. Adjective In Type II, disc degeneration is usually more gradual, and the annulus fibrosus fibers become soft and put pressure on the spinal cord over time. 2. Noun, singular or mass It is also called the annulus and not all mushrooms have them.