'corpsman' originates from the combination of 'corps' and 'man', where 'corps' refers to a branch of the military and 'man' refers to a person.

'corpsman' evolved from the term 'corps' used in military contexts, combined with 'man' to denote a person serving in a specific role.

Initially, it referred to any member of a military corps, but over time it evolved to specifically denote a medical specialist in the military.