[ki-meer-uh, kahy-]
noun, plural chimeras.
(often initial capital letter) a mythological, fire-breathing monster, commonly represented with a lion's head, a goat's body, and a serpent's tail.
any similarly grotesque monster having disparate parts, especially as depicted in decorative art.
a horrible or unreal creature of the imagination; a vain or idle fancy: He is far different from the chimera your fears have made of him.
Genetics. an organism composed of two or more genetically distinct tissues, as an organism that is partly male and partly female, or an artificially produced individual having tissues of several species.
Also, chimaera.

1350–1400; Middle English chimera < Latin chimaera < Greek chímaira she-goat; akin to Old Norse gymbr, English gimmer ewe-lamb one year (i.e., one winter) old, Latin hiems winter (see hiemal), Greek cheimṓn winter

3. dream, fantasy, delusion. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
chimera or chimaera (kaɪˈmɪərə, kɪ-, kaɪˈmɪərə, kɪ-)
1.  (often capital) Greek myth a fire-breathing monster with the head of a lion, body of a goat, and tail of a serpent
2.  a fabulous beast made up of parts taken from various animals
3.  a wild and unrealistic dream or notion
4.  biology an organism, esp a cultivated plant, consisting of at least two genetically different kinds of tissue as a result of mutation, grafting, etc
[C16: from Latin chimaera, from Greek khimaira she-goat, from khimaros he-goat]
chimaera or chimaera
[C16: from Latin chimaera, from Greek khimaira she-goat, from khimaros he-goat]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

late 14c., from L. Chimaera, from Gk. chimaira, a fabulous monster (with a lion's head, a goat's body, and a serpent's tail), supposedly personification of snow or winter, orig. "year-old she-goat," from cheima "winter season." Meaning "wild fantasy" first recorded 1587.
"Beestis clepid chymeres, that han a part of ech beest, and suche ben not, no but oonly in opynyoun." [Wyclif, "Prologue"]
Related: Chimeric (1650s); chimerical (1630s).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

chimera chi·me·ra (kī-mēr'ə, kĭ-)

  1. One who has received a transplant of genetically and immunologically different tissue.

  2. Twins with two immunologically different types of red blood cells.

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
Cultural Dictionary
chimera [(keye-meer-uh, ki-meer-uh)]

A monster in classical mythology who had the head of a lion, the body of a goat, and the tail of a dragon or serpent.

Note: Figuratively, a “chimera” is a creation of the imagination, especially a wild creation.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
They are chimeras, composed of odd parts stuck together.
Chimeras differ from gargoyles in that the latter are rainwater drains.
Our cells remain chimeras, a hybrid fusion of unrelated creatures.
There are no plans to create human chimeras, a researcher emphasized.
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