sillock/ˈsɪ.lək/EtymologyFrom sill (“newly hatched young of fish, fry”) + -ock, ultimately from Old Norse síl, síld (“herring”), whence also dialectal Swedish sil (“the young of fish, fry”) and Norwegian sil (“sand-eel”). More at sile.sillock means A pollock or a coalfish, sometimes especially a young coalfish. Lexicurio rates it Sui generis — a strength score of 87 out of 100.sillock is pronounced /ˈsɪ.lək/.nounA pollock or a coalfish, sometimes especially a young coalfish.