1. n. (pl. same) a small freshwater fish, esp. Rutilus rutilus, allied to the carp.
Etymology: ME f. OF roc(h)e, of unkn. orig. 2. n.1 US colloq. a cockroach.
2 sl. the butt of a marijuana cigarette.
Etymology: abbr. 3. n. Naut. an upward curve in the foot of a square sail.
Etymology: 18th c.: orig. unkn.