'aglaos' originates from Ancient Greek, specifically the word 'ἀγλαός', where 'ἀγλαός' meant 'bright' or 'splendid'.

The Greek word 'ἀγλαός' was adopted into English as 'aglaos', retaining its original meaning of brightness and splendor.

Initially, it meant 'bright' or 'splendid', and this meaning has largely remained the same in modern usage.