n. [ From the French chemist, J. L. Proust. ] (Min.) A sulphide of arsenic and silver of a beautiful cochineal-red color, occurring in rhombohedral crystals, and also massive; ruby silver. [ 1913 Webster ]
a. [ Gr. &unr_; standing before, fr. &unr_; to set before; &unr_; before + &unr_; to set: cf. F. prostate. ] (Anat.) Standing before; -- applied to a gland which is found in the males of most mammals, and is situated at the neck of the bladder where this joins the urethra. --