(1):

(n.) Anything in the form of lozenge.

(2):

(n.) A small cake of sugar and starch, flavored, and often medicated. - originally in the form of a lozenge.

(3):

(n.) A figure with four equal sides, having two acute and two obtuse angles; a rhomb.

(4):

(n.) A form of the escutcheon used by women instead of the shield which is used by men.

(5):

(n.) A diamond-shaped figure usually with the upper and lower angles slightly acute, borne upon a shield or escutcheon. Cf. Fusil.