exalginPharmacy.|ɛksˈældʒɪn| Also exalgine. [f. ex- prefix1 + Gr. ἄλγ-ος pain + -in.] A methyl compound of acetanilide, so called from its use as an anodyne. 1889Pharm.Jrnl. 30 Mar. 781/1 Exalgine occurs in needles or in large white tablets.1890Daily News 1 Dec. 5/6 A prescription ordering exalgine.