Biology. the lack of correspondence of apparently similar organic structures as the result of unlike origins of constituent parts.
Pathology. abnormality; structural difference from a type or normal standard.
Origin of heterology
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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Historical Examples of heterology
Heterology, het-er-ol′oj-i, n. abnormality, want of true morphological affinity.
Lack of correspondence between bodily parts, as in structure or development, arising from differences in origin.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.