the white of an egg.
Botany. the nutritive matter around the embryo in a seed.
Biochemistry, albumin.

1590–1600; < Late Latin, equivalent to alb(us) white, with stem in -ū- + -men noun suffix

albumen, albumin. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
albumen (ˈælbjʊmɪn, -mɛn)
1.  the white of an egg; the nutritive and protective gelatinous substance, mostly an albumin, that surrounds the yolk
2.  a rare name for endosperm
3.  a variant spelling of albumin
[C16: from Latin: white of an egg, from albus white]

albumin or albumen (ˈælbjʊmɪn)
any of a group of simple water-soluble proteins that are coagulated by heat and are found in blood plasma, egg white, etc
[C19: from albumen + -in]
albumen or albumen
[C19: from albumen + -in]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

c.1600, "white of an egg," from L. albumen "white of an egg," lit. "whiteness," from albus "white" (see alb). The organic substance (which exists nearly pure in egg whites) so called from 1800, also known as albumin (1869, from Fr. albumine).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

albumen al·bu·men (āl-byōō'mən)

  1. The white of an egg, which consists mainly of albumin dissolved in water.

  2. Albumin.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
albumen   (āl-by'mən)  Pronunciation Key 
The white of the egg of certain animals, especially birds and reptiles, consisting mostly of the protein albumin. The albumen supplies water to the growing embryo and also cushions it. Albumen is used commercially in making wine, vinegars, lithographs, dyes, and pharmaceuticals.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The shell performs no office in clearing except for the albumen which clings to it.
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