The Collaborative International Dictionary
Cackerel
Cackerel \Cack"er*el\, n. [OF. caquerel cagarel (Cotgr.), from the root of E. cack.] (Zo["o]l.) The mendole; a small worthless Mediterranean fish considered poisonous by the ancients. See Mendole.
Wiktionary
cackerel
n. The mendole; a small Mediterranean fish considered poisonous by the ancients.