Tomcod \Tom"cod`\, n. [Tom (see {Tomboy}) + cod: cf. F. tacaud whiting pout, American Indian tacaud, literally, plenty fish.] (Zo["o]l.) (a) A small edible American fish ({Microgadus tomcod}) of the Codfish family, very abundant in autumn on the Atlantic coast of the Northen United States; -- called also {frostfish}. See Illust. under {Frostfish}. (b) The kingfish. See {Kingfish} (a) . (c) The jack. See 2d {Jack}, 8. (c) .