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chimaera

chimaera   Quick reference

A Dictionary of Biology (8 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
62 words

...chimaera An organism composed of tissues that are genetically different. Chimaeras can develop if a mutation occurs in a cell of a developing embryo. All the cells arising from it have the mutation and therefore produce tissue that is genetically different from adjacent tissue, e.g. brown patches in otherwise blue eyes in humans. Graft hybrids are examples of plant chimaeras...

chimaera

chimaera   Quick reference

World Encyclopedia

Reference type:
Subject Reference
Current Version:
2004
Subject:
Encyclopedias
Length:
56 words

... ( ratfish or ghost shark ) One of about 28 species of cartilaginous, deep-sea fish with a long, poisonous, dorsal spine and a slender tail. An oil, derived from its liver, is used as a lubricant. Length: 60cm-2m (23–80in). Families Chimaeridae, Collorhinchidae and Rhinochimaeridae. The term also refers to an animal formed from several different...

chimaera

chimaera   Quick reference

The Concise Oxford Dictionary of Archaeology (2 ed.)

Reference type:
Subject Reference
Current Version:
2009
Subject:
Archaeology, History
Length:
51 words

... [Ge] A mythological fire‐breathing monster with a lion's head, dragon's hind quarters, and a goat's middle. Allegedly once a visitant to Lycia in Asia Minor. The image was often used in forging trading connections between the Middle East and the Far East as it suggested familiarity with oriental decorative...

Chimaera

Chimaera   Reference library

Alan H. Griffiths

The Oxford Classical Dictionary (4 ed.)

Reference type:
Subject Reference
Current Version:
2012
Subject:
Classical studies, History
Length:
105 words

... (Χίμαιρα, ‘she-goat’), bizarre monster slain by Bellerophon , composed of ‘lion in front, snake behind, and she-goat in the middle’ ( Il. 6. 179–82); in art the eponymous central head (sometimes a protome with forefeet) which protrudes uneasily from the lion's back may be made less risible by allowing it to perform the fire-breathing which Homer and Hesiod describe. The latter ( Theog. 319 ff.) assigns it to the monstrous family of Typhon and Echidna , while Homer claims it was specially reared by ‘Amisodarus’ ( Il. 16. 328). A. Jacquemin in...

chimaera

chimaera   Quick reference

Mike Allaby

Dictionary Plus Science and Technology

Reference type:
Subject Reference
Current Version:
2016
Subject:
Science and technology
Length:
40 words

... 1. ( rabbitfish ) A fish ( Chimaera monstrosa ) that lives at depths of 100–500 m in the oceans off Western Europe. 2. ( chimera ) Tissue containing two genetically distinct types of cell, or an organism consisting of such tissue. Mike...

chimera

chimera   Quick reference

The Oxford Dictionary of Philosophy (3 ed.)

Reference type:
Subject Reference
Current Version:
2016
Subject:
Philosophy
Length:
22 words

... ( chimaera ) A wild fancy. In Greek mythology, a fire-breathing monster with a lion’s head, a goat’s body, and a serpent’s...

chimera

chimera   Quick reference

A Dictionary of Zoology (5 ed.)

Reference type:
Subject Reference
Current Version:
2020
Subject:
Science and technology, Life Sciences
Length:
46 words

... ( chimaera ) Tissue containing two or more genetically distinct cell types, or an individual composed of such tissues. It arises in animals as a result of mutation or abnormal distribution of chromosomes , affecting a particular cell during development and hence all its descendants....

Chimera

Chimera   Reference library

The Oxford Companion to World Mythology

... One of many distorted and bestial offspring of the monsters Echnida and Typhon— also including Cerberus, Scylla , Orthus, and Gorgon —the Chimera (Chimaera Greek khimaira , “she-goat”) was a fire-breathing monster with the head of a lion, the tail of a serpent or dragon , and a goat's head in the middle. Her impossibly fanciful anatomy gives us our word “chimerical,” meaning unreal, imaginary, given to fantasies. The Chimera, who did terrible things to the people of Lycia, where a volcano is named after her, was killed by the hero Bellerophon...

chimera

chimera   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
65 words

... an individual composed of a mixture of genetically different cells. In plant chimeras, the mixture may involve cells of identical nuclear genotypes, but containing different plastid types. In more recent definitions, chimeras are distinguished from mosaics ( q.v .) by requiring that the genetically different cells of chimeras be derived from genetically different zygotes. See also aggregation chimera , heterologous chimera , mericlinal chimera , periclinal chimera , radiation chimera...

chimera

chimera   Reference library

Oxford Dictionary of Biochemistry and Molecular Biology (2 ed.)

Reference type:
Subject Reference
Current Version:
2008
Subject:
Science and technology, Life Sciences
Length:
177 words

... or (esp. Brit.) chimaera (in genetics) an organism comprising tissues of two or more genotypes . Chimeras can occur as a result of mutation, abnormal distribution of chromosomes, grafting, or genetic manipulation. For example, a chimera can be created by mixing the cells from embryos of two different animal species at the blastocyst stage of development and implanting the chimeric embryo in a surrogate mother to continue development. When the species are sheep and goats, the resulting chimeric progeny are called ‘geep’, or ‘shoats’. Alternatively,...

chimera

chimera   Quick reference

A Dictionary of Plant Sciences (4 ed.)

Reference type:
Subject Reference
Current Version:
2019
Subject:
Science and technology, Life Sciences
Length:
85 words

... ( chimaera ) A tissue containing two or more genetically distinct cell types, or an individual composed of such tissues. It arises as a result either of: ( a ) mutation or abnormal distribution of chromosomes , affecting a particular cell during development and hence all its descendants; or ( b ) in the case of plants, by the artificial grafting together of two individuals with different genotypes , to produce a mixing of characters. It is also referred to as a...

chimera

chimera n.   Quick reference

A Dictionary of Psychology (4 ed.)

Reference type:
Subject Reference
Current Version:
2015

... n. 1. An organism composed of two or more genetically distinct tissue types or created by combining genes from two or more different individuals or species. Also called a mosaic . Also spelt chimaera . 2. In Greek mythology, a fire-breathing monster with a lion’s head, a goat’s body, and a serpent’s tail. chimeric or chimaeric adj. [From Greek chimaira a...

Chimera

Chimera   Quick reference

World Encyclopedia

Reference type:
Subject Reference
Current Version:
2004
Subject:
Encyclopedias
Length:
30 words

... In Greek mythology, a monster with a lion's head, goat's body, and dragon's tail. She was the sister of Cerberus, Hydra , and the sphinx , and was slain by Bellerophon...

Chimera

Chimera ([Gk Myth.])   Quick reference

A Dictionary of Reference and Allusion (3 ed.)

Reference type:
Subject Reference
Current Version:
2010
Subject:
Language reference
Length:
81 words

... [Gk Myth.] A fire-breathing monster with a lion's head, a goat's body, and a serpent's tail. > A creature made up of parts taken from different animals; something unrealistic that one hopes for but can never achieve This idea of a clear species identity is what makes the idea of hybrids or chimeras so disturbing. Scotland on Sunday 2005 Some in America, in spite of Iraq, still pursue the chimera of total safety through total dominance. Guardian Unlimited columnists ...

chimera

chimera   Quick reference

A Dictionary of Biomedicine (2 ed.)

Reference type:
Subject Reference
Current Version:
2019

...chimera An organism composed of two genetically distinct types of cells. Chimeras can be formed by the fusion of two early blastula-stage embryos, in which case the ratios of the two lineages is likely to be similar; if an organ is of only one genetic type, this suggests that there was only one stem cell (or a small number). Reconstitution of the bone marrow in an irradiated recipient produces a chimera, as does any allogeneic transplantation of tissue. Females are in a sense chimeric since one X chromosome or the other is inactivated more or less...

Chimera

Chimera   Reference library

Brewer's Dictionary of Phrase & Fable (19 ed.)

Reference type:
Subject Reference
Current Version:
2013

... (Greek khimaira , ‘she-goat’) A fabulous monster in Greek mythology. According to Homer it has a lion’s head, a goat’s body and a dragon’s tail. It was born in Lycia and slain by bellerophon . Hence the use of the name in English for a wild, unrealistic fancy or...

chimera

chimera   Reference library

The Oxford Companion to the Body

Reference type:
Subject Reference
Current Version:
2003
Subject:
Science and technology, Life Sciences
Length:
679 words

...out rarely to eat young men. The Chimera was eventually killed by the hero Bellerophon, aided by another hybrid descended from Earth and Sea — the winged horse, Pegasus. Only by rising into the air above the Chimera was it possible to evade destruction by her fire-breathing head. Because of her triple bodily nature and, in particular, the presence of three different heads, the Chimera is difficult to represent; in art, the lion part often dominates. It has been argued that, because of the uncertainty of her form, the Chimera has become a creature of language,...

chimera

chimera   Reference library

Garner’s Modern English Usage (4 ed.)

Reference type:
Subject Reference
Current Version:
2016

... . A. Spelling and Pronunciation. The form chimera is now standard, ✳chimaera rarely appearing. The word is pronounced /kɪ- meer -ә/ . Current ratio: 7:1 B. Plural. The better plural is chimeras . The form chimerae is an affectation—e.g.: “Similarly grotesque creatures can be found in French furniture of the Francis I period ( 1483–1547 ), when chimerae [read chimeras ], draped human figures, and stylized scrolls were popular motifs.” Page Talbott , “Allen and Brother, Philadelphia Furniture Makers,” Mag. Antiques , May 1996 , at 716. See...

Chi'maera

Chi'maera   Reference library

The Oxford Companion to Classical Literature (3 ed.)

Reference type:
Subject Reference
Current Version:
2011
Subject:
Literature, Classical studies
Length:
53 words

... In Greek myth, a fire-breathing monster with the head of a lion, body of a she-goat, and tail of a snake, the offspring of Typhon and Echidna. It was killed by Bellerophon , mounted on the winged horse Pegasus. http://media-2.web.britannica.com/eb-media/90/28190-004-6970B6F6.jpg The bronze Chimaera of Arezzo (Arretium), an Etruscan statue from c. 400 ...

heterologous chimera

heterologous chimera   Quick reference

A Dictionary of Genetics (8 ed.)

Reference type:
Subject Reference
Current Version:
2014
Subject:
Science and technology, Life Sciences
Length:
14 words

...chimera a chimera ( q.v. ) formed by cells or tissues from two different...

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