A ribbon-like arrangement of cells, usually oriented in the radial direction
Rays is British slang for sunshine.
ribbon-like groups of vessels, tracheids and fibers that move water and other substances in the xylem between inner and outer rings and the phloem; best seen in radial sections of the trunk.
The soft or spiny supporting elements of fish fins.
Designation (also medullary rays) for the radial wooden channels; see below Xylem,