heterochrony

het·er·och·ro·ny

noun \-ˈräk-rə-nē\

plural het·er·och·ro·nies

Definition of HETEROCHRONY

1

: deviation from the typical embryological sequence of formation of organs and parts as a factor in evolution

2

: irregularity in time relationships; specifically : the existence of differences in chronaxies among functionally related tissue elements

—het·er·och·ro·nous \-ˈräk-rə-nəs\ adjective