radiation; radiant rays
Refers to rays or beams of radiation, such as light, heat, or other electromagnetic waves. Often used in scientific or technical contexts.
Radiation from the sun warms the Earth.
This device blocks harmful radiation.
Compound of 輻射 (ふくしゃ, 'radiation') and 線 (せん, 'ray' or 'line'). The exact historical derivation is uncertain, but the kanji are conventionally associated with the meaning of radiating rays.