acromegalic UK /ˌakɹə(ʊ)mɪˈɡalɪk/US /ˌækɹoʊmɪˈɡælɪk/adjective 1noun 1forms 3 adjective1 •Pertaining to or characteristic of acromegaly.At that moment a match flared on the far side of the room and illuminated the ruddy acromegalic features of Smirke […] — 1982 noun1 •A person affected by acromegaly. formsacromegalics · more acromegalic · most acromegalic