microcephalous vs microcephalic

microcephalous and microcephalic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
microcephalous	No	Yes	No	No
microcephalic	No	Yes	No	No

As adjectives, microcephalous and microcephalic are synonyms defined as:

microcephalous and microcephalic: having an abnormally small head and underdeveloped brain

Other synonyms of microcephalous include nanocephalic.

microcephalous (adjective)	microcephalic (adjective)
having an abnormally small head and underdeveloped brain	having an abnormally small head and underdeveloped brain