(surgery) appendectomy

(meteorology) the mesosphere (layer of the Earth's atmosphere)

a malleus (small hammer-shaped bone of the middle ear)

a focus on cosmetic differences between two objects without realizing that they are substantively identical, distinction without a difference / the act of deceiving a person

gall (blister or tumor-like growth found on the surface of plants)

gall wasp

statement, declaration

a place name, such as that of Hachiōji City in Tokyo Metropolis

(humanities) sinology

Kyūjitai form of 中国学: Sinology