To empty or unload, as the vessels of the human system, by bloodletting or by medicine.
To reduce by destroying or consuming the vital powers of; to exhaust, as a country of its strength or resources, a treasury of money, etc.
To perform a phlebotomy on (a person): to open a vein of (a person) to withdraw or let blood.
To perform a phlebotomy on (a vein): to open (a vein) to withdraw or let blood.
To perform a phlebotomy; to open a vein to withdraw or let blood.