The Collaborative International Dictionary
Citrine ointment
Citrine \Cit"rine\, a. [F. citrin. See Citron.] Like a citron or lemon; of a lemon color; greenish yellow.
Citrine ointment (Med.), a yellowish mercurial ointment, the unguentum hydrargyri nitratis.
Wiktionary
citrine ointment
n. (context medicine archaic English) A yellowish mercurial ointment, the ''unquentum hydrargyri nitratis''.