(physics) theoretical physics

(physics, astronomy) black-body radiation

body / physique, constitution, frame / health

physics (as an area of study)

(physics, astronomy) a blackbody

part, section, segment, portion

important, significant

importance, consequence, significance

black (color) / (go) a black stone; the person who plays black stones / a 女房詞 (nyōbō kotoba, “woman's word”) for 鍋 (nabe, “pot, pan”) or 釜 (kama, “pot, kettle”)

physics, the physical aspects of a phenomenon or a system