最終更新日：2024/07/28

A point source from which radiation is emitted. / (astronomy) The apparent origin, in the night sky, of a meteor shower.

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radiant

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元となった辞書の項目

radiant

noun

The sun is a radiant that emits light and heat.

意味（1）

A point source from which radiation is emitted.

意味（2）

(astronomy) The apparent origin, in the night sky, of a meteor shower.

意味（3）

(geometry) A straight line proceeding from a given point, or fixed pole, about which it is conceived to revolve.