'isocarpous' originates from New Latin/Modern botanical Latin, specifically built from the Greek elements 'isos' and 'karpos', where 'isos' meant 'equal' and 'karpos' meant 'fruit'.

'isocarpous' was formed in New Latin from Greek roots ('isos' + 'karpos'), passed into botanical Latin as 'isocarpus'/'isocarpous' and was adopted into English usage as the technical adjective 'isocarpous'.

Initially it literally meant 'equal fruit' (from the Greek roots), and over time it has come to be used specifically as a technical botanical term meaning 'having carpels or fruits of equal size or form'.