Webster’s Revised Unabridged Dictionary · 1913
Opobalsam
Op′o·bal′sam, Op′o·bal′sa·mum, n. [L. opobalsamum, Gr. ὀποβάλσαμον; ὀπός vegetable juice + βάλσαμον balsam.] (Med.) The old name of the aromatic resinous juice of the Balsamodendron opobalsamum, now commonly called balm of Gilead. See under Balm.