Scrabble?! HYPOMORPHS

Definitions of HYPOMORPHS in various dictionaries:

In evolutionary developmental biology, heterochrony is a developmental change in the timing or rate of events, leading to changes in size and shape. It is contrasted with heterotopy, a change in spatial positioning of some process in the embryo, which can also create morphological innovation. Following the framework of Reilly et al, heterochrony can be divided into intraspecific heterochrony that explains variation within a species, and interspecific heterochrony that explains developmental variation phylogenetically, in the timing or rate of events of a descendent species with respect to an ancestral species. These changes all affect the start, end, rate, or timespan of a particular developmental process. The concept of heterochrony was introduced by Ernst Haeckel in 1875, and given its modern sense by Gavin de Beer in 1930.