本ほん影えいほんえいじ字FuriganaMeanings1nounumbraAstronomical term for the fully shaded inner region of a shadow, especially during an eclipse.月げっ食しょくでは、月つきが地ち球きゅうの本ほん影えいに入はいる。During a lunar eclipse, the moon enters the Earth's umbra.
