'armillated' originates from Latin, specifically the word 'armillatus', from 'armilla' meaning 'bracelet' or 'ring'.

'armillated' derives from Latin 'armillatus' (past participle of 'armillare', 'to furnish with bracelets'), moved into Late/Medieval Latin usage and was adopted into English as a descriptive adjective meaning 'having bracelets or ring-like bands'.

Initially, it meant 'furnished with bracelets' in literal sense; over time it has been used more generally to mean 'ringed' or 'having circular bands', especially in descriptive contexts (e.g., architecture, sculpture, zoology, botany).