noun
medium build
Describes a person's body type that is neither fat nor thin. Often used in the set phrase 中肉中背 (ちゅうにくちゅうぜい).
See also: 中肉中背 (ちゅうにくちゅうぜい)
彼は中肉中背で、平均的な体格だ。
He is of medium build and average stature.
中肉の男性が立っていた。
A man of medium build was standing there.
noun
meat of medium quality
Used in contexts like grading meat, where it refers to a middle tier of quality, not the highest grade.
この店では中肉のステーキを手頃な値段で出している。
This restaurant serves medium-quality steak at a reasonable price.
小柄 means small build, contrasting with 中肉.
Compound of 中 (ちゅう, 'middle') and 肉 (にく, 'flesh'). The body-type sense is a straightforward extension of 'medium flesh'.