Definition of radiant point in English:

1A centre point from which rays or radii proceed.

1. 1.1Astronomy The apparent focal point of a meteor shower.
   〔天文〕（流星雨的）辐射点
   Example sentencesExamples

   • Generating a sky map on 8-12-2004, we find that the radiant point will be high in the northeastern sky, not far below the zenith.
   • Much of the first part takes place at night, in a black and white symphony of moving radiant points and rich shades of darkness.
   • The sickle is the western portion of Leo and that is the radiant point for the meteor showers.
   • Trace some backwards: they all lead to a radiant point in the constellation Gemini.