'ambrosioides' originates from New Latin (botanical Latin), specifically formed from the genus name 'Ambrosia' (from Greek 'Ambrosia') plus the suffix '-oides', where '-oides' meant 'resembling' or 'like'.

'ambrosioides' was created in New Latin for use in scientific nomenclature by combining 'Ambrosia' with the Greek-derived suffix '-oides'; it entered botanical usage as a species epithet (e.g., Chenopodium/Dysphania ambrosioides).

Initially, it meant 'resembling Ambrosia' in formation, and this basic meaning has been retained in modern botanical usage as a descriptive species epithet.