yolk

[yohk, yohlk]
noun
1.
the yellow and principal substance of an egg, as distinguished from the white.
2.
Embryology. the part of the contents of the egg of an animal that enters directly into the formation of the embryo, together with any material that nourishes the embryo during its formation.
3.
the essential part; the inner core.
4.
a natural grease exuded from the skin of sheep.
Also, yoke.


Origin:
before 1000; Middle English yolke, yelke, Old English geoloca, derivative of geolu yellow

yolked, adjective
yolkless, adjective
yolky, adjective

yoke, yolk.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To yolk
Collins
World English Dictionary
yolk (jəʊk)
 
n
1.  the substance in an animal ovum consisting of protein and fat that nourishes the developing embryoRelated: vitelline
2.  a greasy substance secreted by the skin of a sheep and present in the fleece
 
Related: vitelline
 
[Old English geoloca, from geoluyellow]
 
'yolkless
 
adj
 
'yolky
 
adj

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

yolk
O.E. geolca, geoloca "yolk," lit. "the yellow part," from geolu "yellow" (see yellow). Formerly also spelled yelk.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Medical Dictionary

yolk (yōk)
n.
The portion of the egg of an animal that consists of protein and fat from which the early embryo gets its main nourishment and of protoplasmic substances from which the embryo develops.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
yolk   (yōk)  Pronunciation Key 
The yellow internal part of the egg of a bird or reptile. The yolk is surrounded by the albumen and supplies food to the developing young.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Slang Dictionary

yolk definition


  1. n.
    semen. (Possibly confused with egg white.) : Clean up that yolk before somebody sees it.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw-Hill Education.
Cite This Source
Encyclopedia Britannica
Encyclopedia

yolk

the nutritive material of an egg, used as food by a developing, embryonic animal. Eggs with relatively little, uniformly distributed yolk are termed isolecithal. This condition occurs in invertebrates and in all but the lowest mammals. Eggs with abundant yolk concentrated in one hemisphere of the egg are termed telolecithal. This occurs in many invertebrates and in all vertebrates lower than marsupial mammals. In arthropods, the yolk is massed near the centre of the egg; such eggs are termed centrolecithal

Learn more about yolk with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source
Example sentences
The cost of a lifetime spent opening eggs incompetently is a small amount of
  wasted time and some spilled yolk.
The raw egg starts to spin again because it has liquid yolk and egg white
  inside.
Inside the pouch, the tadpoles live on the yolk leftover from their hatching.
Scavengers such as crickets might have fed on the yolk, and spiders later dined
  on the scavengers.
Synonyms
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT

;