[Sp.:—OSp. arrogio, med.L. arrogium, found as early as 775 (Diez); origin uncertain.] A rivulet or stream; hence, the bed of a stream, a gully. (in U.S.)
1850. B. Taylor, Eldorado, v. (1862), 49. The deep gullies or arroyos with which it is seamed.
1872. C. King, Mountain. Sierra Nev., vi. 119. At brief intervals, were sharp, narrow arroyos.
