Lewis & Short

xylŏcinnămōmum, i, n., = ξυλοκιννάμωμον, the wood of the cinnamonshrub, cinnamon-wood, Plin. 12, 19, 42, § 91; Dig. 39, 4, 16, § 7.
Also contracted, xylŏ-cinnămum, i, n., Scrib. Comp. 271.