heterochrony

(redirected from Heterochronism)
Also found in: Dictionary, Encyclopedia.

heterochrony

(hĕt′ə-rō-krŏn′ē)
n.
A change or set of changes in the timing or duration of an organism's ontogenetic development compared with an ancestral species, resulting in morphological differences between ancestor and descendant.

het′e·ro·chron′ic, het′e·ro·chron′ous adj.