ὀπο-βάλσᾰμον · opo-balsamon — LSJ
the juice of the balsam-tree, balsam of Mecca, Thphr. HP 4.4.14, CP 6.18.2, J. AJ 14.4.1, Gal. 12.554, Edict.Diocl. in BCH 22.403 (written ὀποπ-, as also in PMed.Strassb. p.4 K., Gloss.); the tree itself, Balsamodendron Opobalsamum, J. AJ 8.6.6, al.