Demon core, a spherical subcritical mass of plutonium manufactured during World War II by the United States as a fissile core for an early atomic bomb

赤外線天文学: infrared astronomy

花一匁: a traditional Japanese children's game that is similar to the game red rover

good fortune comes to the homes of those who smile

Obsolete spelling of スマトラ

The way to distinguish an olive flounder from a righteye flounder. 鮃(ひらめ) (hirame, “olive flounder”) can be distinguished from 鰈(かれい) (karei, “righteye flounder”) by noting that the eyes of the former are on the left and the eyes of the latter are on the right.

astronomer

Alternative spelling of 花一匁

(astronomy) radio astronomy

a traditional Japanese children's game that is similar to the game red rover