To administer a dose to.
To prescribe a dose.
To transmit a venereal disease.
A venereal infection.
A measured portion of medicine taken at any one time.
The quantity of an agent (not always active) substance or radiation administered or experienced at any one time.
To serve the whole of some period.
To deal out or distribute.
To win a set, or by extension a match, by holding serve (winning a game as the server).