'acidosis' originates from New Latin, specifically the word 'acidus,' where 'acidus' meant 'sour' or 'sharp.'

'acidus' transformed into the medical term 'acidosis' in the early 20th century, reflecting the condition of increased acidity in the body.

Initially, it referred to the sour or sharp nature of substances, but over time it evolved into its current medical meaning of increased acidity in body fluids.