HETEROLOGY
heterology
(noun) (biology) the lack of correspondence of apparently similar body parts
Source: WordNet® 3.1
Etymology
Noun
heterology (countable and uncountable, plural heterologies)
A lack of correspondence between parts that reflects a difference in origin
Antonyms
• homology
Anagrams
• thereology
Source: Wiktionary
Het`er*ol"o*gy, n. Etym: [Hetero- + -logy.]
1. (Biol.)
Definition: The absence of correspondence, or relation, in type of
structure; lack of analogy between parts, owing to their being
composed of different elements, or of like elements in different
proportions; variation in structure from the normal form; -- opposed
to homology.
2. (Chem.)
Definition: The connection or relation of bodies which have partial
identity of composition, but different characteristics and
properties; the relation existing between derivatives of the same
substance, or of the analogous members of different series; as,
ethane, ethyl alcohol, acetic aldehyde, and acetic acid are in
heterology with each other, though each in at the same time a member
of a distinct homologous series. Cf. Homology.
Source: Webster’s Unabridged Dictionary 1913 Edition