1392, from M.L. suppositorium, noun use of neut. of L.L. suppositorius "placed underneath or up," from L. suppositus, pp. of supponere "put or place under" (see suppose).
suppository sup·pos·i·to·ry (sə-pŏz'ĭ-tôr'ē) n. A small plug of medication designed to melt at body temperature within a body cavity other than the mouth, especially the rectum or vagina.