1. A kind of herring.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• firsco,
• csico,
• phsco,
• cisty,
• cisis,
• rosco,
• cisr,
• circs,
• ciso,
• cissn,
• pysco,
• cico,
• cyco,
• cisit,
• visca,
• casico,
• civc,
• cosco,
• cice,
• fisaco

• cisc,
• cis,
• wisc.,
• cichy,
• disco,
• disc,
• cissy.

The adjective form of the word "cisco" is "ciscean".