emitting or proceeding as from a center; resembling rays; radiating; radiate.-especially, emitting or darting rays of light or heat; issuing in beams or rays; beaming with brightness; emitting a vivid light or splendor; as, the radiant sun.-beaming with vivacity and happiness; as, a radiant face.-giving off rays; -- said of a bearing; as, the sun radiant; a crown radiant.-having a raylike appearance, as the large marginal flowers of certain umbelliferous plants; -- said also of the cluster which has such marginal flowers.-the luminous point or object from which light emanates; also, a body radiating light brightly.-a straight line proceeding from a given point, or fixed pole, about which it is conceived to revolve.-the point in the heavens at which the apparent paths of shooting stars meet, when traced backward, or whence they appear to radiate.