"of the nature of, pertaining to, or obtained from resin," 1640s, from Latin resinosus, from resina (see resin). Resiny "having a character or quality like resin" is attested from 1570s.
Entries linking to resinous
resin n.
hardened secretions of various plants, used in medicine, varnishes, etc., late 14c., from Old French resine "gum, resin," and directly from Latin resina "resin," from Greek rhetine "resin of the pine," a word of unknown origin. Applied to synthetic products by 1883. Related: Resiniferous.