regression
immaturity
arrested development
ripe
retrotransposable
fixation
immatureness
preduplication
epeirogenic
pregenitality
recapitulate
preduplicate
neoteny
underdeveloped
autumnal
epeirogenetic
biohydrogeneration
hypermature
throwback
fully-grown
normoevolutive
degenerate
twice removed
epeirogenically
peramorphosis
preproliferative
progeniture
regranulation
begotten
retrotranscript
evolved
idiogenetic
increase
premyogenic
neotenic complex syndrome
chronogenetic
postmutational
biodegeneration
autoregenerative
stirp
next generation
retrocessional
predegraded
morphogenically
tendonogenic
degeneracy
theory of inheritance
retrotranspose
retrotransposing