(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”)

dirt cheap

(idiomatic) four treasures of the study: the brush, ink, paper and inkstone used in Chinese and other East Asian calligraphic traditions

the outer beauty and the inner quality are well-harmonized

refined in manner, exhibiting a balance between civilized sophistication and simplicity

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

year-round