1(Biology and Medicine) change or development that is considered to be retrograde or regressive; retrograde metamorphosis; an instance of this (now rare).
2Geology retrograde metamorphism.
Origin
Mid 19th century.
Definition of retromorphosis in US English:
retromorphosis
noun
1(Biology and Medicine) change or development that is considered to be retrograde or regressive; retrograde metamorphosis; an instance of this (now rare).