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There are 6 twelve-letter words beginning with HETEROC

HETEROCERCAL	• heterocercal adj. (Ichthyology) Of a fish’s tail, such that the vertebral column bends and extends upwards into the upper… • HETEROCERCAL adj. having the vertebral column passing into the upper lobe of the tail, which is usually larger than the lower, as in sharks.
HETEROCHRONY	• heterochrony n. (Biology) the variation in ontogeny of individuals of a species that gives rise to evolution. • HETEROCHRONY n. divergence from normal time sequence in development, also HETEROCHRONISM.
HETEROCLITES	• heteroclites n. Plural of heteroclite. • HETEROCLITE n. an irregularly inflected word.
HETEROCLITIC	• heteroclitic adj. (Linguistics) In linguistics, particularly Indo-European Studies, signifying a stem which alternates… • heteroclitic adj. (Microbiology) Pertaining to antibodies that react to a wide variety of antigens. • heteroclitic n. A heteroclitic noun.
HETEROCYCLES	• heterocycles n. Plural of heterocycle. • HETEROCYCLE n. a ring composed of atoms of more than one kind.
HETEROCYCLIC	• heterocyclic adj. (Chemistry, of a cyclic compound) Having atoms of two or more different elements in at least one of its rings. • heterocyclic adj. (Organic chemistry, of a cyclic compound) Having one or more atoms other than carbon in at least one of its rings. • heterocyclic n. (Organic chemistry) A heterocycle.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the WikWik.org and 1Word.ws.

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English Wiktionary: 23 words
Scrabble in French: 3 words
Scrabble in Spanish: 5 words
Scrabble in Italian: no word
Scrabble in German: no word
Scrabble in Romanian: 9 words

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