The membranous remnants of a partial veil which leaves a ring on the stem of a mushroom.
The ring of the sun not covered by the moon in an annular solar eclipse.
Structure in a fern that consists of differentially thick-walled cells on a sporangium that bend and distort as a result of drying.
A ring- or donut-shaped area or structure.
The region in a plane between two concentric circles of different radii.
The space contained between the centre well bore and any external tubing. Sometimes used for separated gas flow.
Any topological space homeomorphic to the region in a plane between two concentric circles of different radius.
A thin layer of tissue which is attached to or covers a mushroom.
A cover; disguise; a mask; a pretense.
A membrane connecting the margin of the pileus of a mushroom with the stalk; a velum.
Anything that partially obscures a clear view.
A covering for a person or thing; as, a caul (especially over the head)
The calyptra of mosses.
That which separates the living and the spirit world.
An obscuration of the clearness of the tones in pronunciation.
velum (A circular membrane round the cap of a medusa).
Something hung up or spread out to hide or protect the face, or hide an object from view; usually of gauze, crepe, or similar diaphanous material.
To dress in, or decorate with, a veil.
To conceal as with a veil.