Definition of coalsey in English:

coalsey

(also colesay, coalsay)

noun

English Regional, North
rare
  • The coalfish or saithe, Pollachius virens; the young or fry of this.

Origin

Early 19th century; earliest use found in John Brockett (bap. 1788, d. 1842), antiquary. From coal + sey.

Pronunciation

coalsey

/ˈkəʊlseɪ/