Rays of light are narrow beams of light. the first rays of light spread over the horizon The sun's rays can penetrate water up to 10 feet. see also cosmic rays, gamma rays, X-ray
A ribbon like figure caused by the strands of cells which extend across the grain in quarter sawn lumber
A translated half-line: {x + th: t >= 0}, where h is a recession direction We call x the root, and we say the ray is rooted at x (Also see extreme ray )
A radiating part of a flower or plant; the marginal florets of a compound flower, as an aster or a sunflower; one of the pedicels of an umbel or other circular flower cluster; radius