a seed / a pit or stone in a fruit / a gamete (reproductive cell such as a spermatozoan or egg) / a lineage, bloodline / an origin, cause / the materials or ingredients from which something is made

physics (as an area of study)

(physics) baryon

basis, foundation / (martial arts) kihon

physics, the physical aspects of a phenomenon or a system

a particle (body with very small size) / a particle (elementary particle or subatomic particle)

nuclear physics

Clipping of 原子核物理学 (genshikaku butsurigaku, “nuclear physics”).

Synonym of 天体物理学 (tentai butsurigaku, “astrophysics”)

astrophysics