Vellum vs. Velum — What's the Difference?

Vellum is prepared animal skin or "membrane", typically used as a material for writing on. Parchment is another term for this material, and if vellum is distinguished from this, it is by its being made from calfskin, as opposed to that from other animals, or otherwise being of higher quality.

(Biology) A covering or partition of thin membranous tissue, such as the veil of a mushroom, a rim of tissue around the margin of the bell of certain cnidarians, or a membrane of the brain.

A fine parchment made from calfskin, lambskin, or kidskin and used for the pages and binding of books.

(Anatomy) The soft palate.

A work written or printed on this parchment.

(Zoology) A ciliated swimming and feeding organ that develops in certain larval stages of most gastropod and bivalve mollusks.

A heavy off-white fine-quality paper resembling this parchment.

A thin membrane resembling a veil or curtain, such as:

A type of parchment paper made from the skin of a lamb, baby goat, or calf.

(anatomy) the soft palate

A writing paper of very high quality.

(botany) a thin membrane partially covering the cluster of sporangia near the leaf base in quillworts and their extinct relatives

A fine kind of parchment, usually made from calfskin, and rendered clear and white, - used as for writing upon, and for binding books.

(mycology) a veil-like membrane of immature mushrooms extending from the margin of the cap to the stem and is torn by growth, to reveal the gills

A heavy creamy-colored paper resembling parchment

(malacology) a locomotory and feeding organ provided with cilia found in the larval stage of bivalves

Fine parchment prepared from the skin of a young animal e.g. a calf or lamb

(zoology) a annular membrane, typically bordering a cavity, especially in certain molluscs, medusae, and other invertebrates

A delicate membrane found on certain protists

(meteorology) an accessory cloud resembling a veil extending over a large distance; normally associated with cumulus and cumulonimbus

A curtain or covering; - applied to various membranous partitions, especially to the soft palate. See under Palate.

A veil-like organ or part.

Membrane of the young sporophore of various mushrooms extending from the margin of the cap to the stem and is ruptured by growth; represented in mature mushroom by an annulus around the stem and sometimes a cortina on the margin of the cap

Membrane initially completely investing the young sporophore of various mushrooms that is ruptured by growth; represented in the mature mushroom by a volva around lower part of stem and scales on upper surface of the cap

A muscular flap that closes off the nasopharynx during swallowing or speaking