medullary cancer

Path.: The same as SOFT-CANCER. [CANCER.] medullary-rays, s. pl. 1. Bot .: Vertical plates radiating from the pith to the bark through the wood of exogenous stems. In the cro section, the medullary-rays constitute fine radiating lines; in a longitudinal section, they impart to the wood a satiny luster, which in the plane, the sycamore, ., is so marked as to be 2664 highly beautiful. The medullary-rays maintain a connection between the bark and the central part of a stem. 2. Carp .: Carpenters call medullary-rays the silver grain. medullary-sheath, s. Bot .: A thin layer or sheath inclosing the pith of a tree, and interrupted only by the pa age through it of the medullary-rays. It consists of spiral ve els and woody ti ue intermixed. It is the first produced woody layer, formed in the first year's growth. Wherever a leaf is produced, it diverges from the pith, and, pa ing through the petiole, appears as ramifying veins in the blade. mě-dul-lāt-ěd, a. [Lat. medull ( a ) = marrow; Eng. suff. -ated.] Having a medulla.