Also found in: Medical.


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.

[hetero- + Greek khronos, time + -y.]

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


(ˌhɛtərəʊˈkrɒnɪk) or


(Biology) biology occurring at different times or stages
References in periodicals archive ?
Temporally, it encapsulates time until sex/gender "normalization"--through binary choice--is achieved; hence its strong heterochronic dimension.
elegans heterochronic gene lin-4 encodes small RNAs with antisense complementarity to lin-14.
Heterochronic parabiosis: historical perspective and methodological considerations for studies of aging and longevity.
have their origin" in James's random associations ([1902] 1985, 512), just as radically new animal morphologies emerge from the heterochronic rearrangement of the mosaic organism.
TV as time machine: Television's changing heterochronic regimes and the production of history.
elegans heterochronic gene lin-4 encodes-small RNAs with antisense complementarity to lin-14.
12) Jonas Langer, "The Heterochronic Evolution of Primate Cognitive Development," Biological Theory 1, no.
Heterochronic developmental shift caused by thyroid hormone in larval sand dollars and its implications for phenotypic plasticity and the evolution of nonfeeding development.
Further comparisons in a phylogenetic context could shed light on heterochronic process or paedomorphic condition occurred during the evolution of P blainvillei, considering their limited fusion of cranial sutures detected here.
This short sentence illustrates how heterotopic and heterochronic her lake was.
Mechanistically, the anterior location and jaw morphology of the microhylid frog Dermatonotus muelleri has been attributed to heterochronic slowing of developmental rate and early offset of jaw development (Fabrezi et al.
These include heterochronic mutations that alter structures by changing growth rates, homeotic mutations that change the identities of whole body parts, and paedomorphosis, which converts juvenile stages directly to adult ones.