'ammonuria' originates from New Latin, specifically the combination of 'ammonia' and the suffix '-uria,' where 'ammonia' refers to the chemical compound and '-uria' means 'urine condition.'

'ammonuria' was formed in modern medical terminology by combining 'ammonia' and '-uria,' and has been used in medical literature since the late 19th century.

Initially, it meant 'the presence of ammonia in urine,' and this meaning has remained unchanged in modern usage.