(mathematics) geometric mean, specifically, if the variables a, b, c satisfy the relation a:b=b:c, then b is the 幾何中項 of a and c.

a metatarsal bone

the Second Sino-Japanese War

Kyūjitai form of 営業中 (“open”)

(historical) Chinese equivalent of 准大臣 (Jun-daijin): title of an honorary grand minister equal to a vice-daijin; in the same honors between the 内大臣 (naidaijin, “minister of the center”) and the 大納言 (dainagon, “upper counselor”)

(historical) a title of Fujiwara no Korechika, Heian-period nobleman, who first assumed this post

(history) the twelve 律令 (ritsuryō) positions inside the Japanese imperial seraglio

(obsolete) round the clock / (obsolete) all the time

year-round

round the clock / all the time