
Latin, meaning: covering, garment.
Found on
http://archives.nd.edu/vvv.htm

Velamen is a spongy, multiple epidermis that covers the roots of some epiphytic or semi-epiphytic plants, such as orchid and Clivia species. The velamen of an orchid is the white or gray covering of aerial roots (when dry, and usually more green when wet as a result of the appearance of underlying photosynthetic structures). It is many cell layers...
Found on
http://en.wikipedia.org/wiki/Velamen

protective coating or sheath on the roots
Found on
http://orchidfetish.com/glossary.html

The layer(s) of thick, spongy cells on the outside of a root; well developed in epiphytic orchids.
Found on
http://www.anbg.gov.au/cpbr/cd-keys/orchidkey/html/glossary.html

The thick layer of corklike, water
Found on
http://www.beautifulorchids.com/orchids/orchid_care_tips/glossary.html

(from the article `angiosperm`) ...pith in the centre of the vascular cylinder and fibres or sclereids, or both, in the cortex; and extensive well-developed pericyclic fibres. ...
Found on
http://www.britannica.com/eb/a-z/v/12

The thick sponge-like covering of the roots of epiphytic orchids which helps prevent water loss and aids in absorption.
Found on
http://www.clanorchids.com/clanglos.htm

A water-retaining outer layer of the aerial roots of some epiphytes, especially orchids. ... (09 Oct 1997) ...
Found on
http://www.encyclo.co.uk/local/20973

(ve-la´mәn) Latin word meaning a covering structure; a term used in anatomy. See veil and velum.
Found on
http://www.encyclo.co.uk/local/21001

Type: Term Pronunciation: vĕ-lā′men, vĕ-lam′i-nă Synonyms: velum1
Found on
http://www.medilexicon.com/medicaldictionary.php?t=97594

The thick sponge-like covering of the roots of epiphytic orchids which helps prevent water loss and aids in absorption.
Found on
http://www.orchidplantcare.info/orchid-glossary/

protective coating or sheath on the roots
Found on
http://www.orchidspecies.com/glossary.htm

velamen (s), velamina (pl) 1. A spongy absorbent and protective layer that covers the aerial roots of some plants; such as, tree-dwelling orchids. 2. A water-retaining outer layer of the aerial roots of some epiphytes, especially orchids. 3. Any covering membrane.
Found on
http://www.wordinfo.info/words/index/info/view_unit/2272/

spongy tissue that surrounds the roots
Found on
https://www.encyclo.co.uk/local/22591
No exact match found.