Bot. Also thylose. [a. F. tylose (Van Heurck), f. G. thyllen (1845), tüllen sb. pl., of doubtful origin.] An intrusive growth of the wall of a cell into the cavity of a vessel in woody tissue.
1872. Thiselton-Dyer, in Geol. Mag., June, 242. The most curious feature about this wood is … the cellular mass (Tylose) with which the interior of the ducts is filled up. Ibid., 243. Many instances of Tylose are now known.
1884. Bower & Scott, De Bary’s Phaner., 170. The formation of fresh thyloses may continue for a long time in a portion of a vessel.
