رُبَاعِىٌّ

A boy four spans (أَشْبَار) in height. (S and Msb voce خُمَاسِىٌّ, q. v.) It is also applied to a camel, like سُبَاعِىٌّ; [apparently meaning Four cubits in height:] feminine with ة. (TA in article سبع.)

[Also A word composed of four letters, radical only, or radical and augmentative.]