Meaning

noun hard dark reddish wood of a rosewood tree having a strongly marked grain; used in cabinetwork

noun any of those hardwood trees of the genus Dalbergia that yield rosewood--valuable cabinet woods of a dark red or purplish color streaked and variegated with black

originA compound of rose + wood, originally so named because of the rose-scented aromatic oil derived from it; applied in later senses on account of these woods’ predominantly reddish-brown colour.

Etymology from Wiktionary, CC BY-SA 3.0