せきがいせん
Meanings
Noun
1. infrared rays; infrared radiation
Kanji used
red
outside
line
Pitch accent
きがいせん
Top 28900
Composed of
line; stripe; line (e.g. telephone line); wire; ray (e.g. X-ray); beam; line (e.g. of a railroad)
Examples (2 in total)
Our eyes can't see infrared light.
Infrared and ultra-violet rays are types of light invisible to the human eye.