• Webster's Revised Unabridged Dictionary
    • n Rockling (Zoöl) Any species of small marine fishes of the genera Onos and Rhinonemusformerly Motella), allied to the cod. They have three or four barbels.
    • ***
Century Dictionary and Cyclopedia
    • n rockling A gadoid fish of the genus Onos or Motella; a whistlefish; a sea-loach. Several species are distinguished by the number of their barbels, as three-bearded, four-bearded, five-bearded. Also called gade.
    • n rockling Genypterus australis, of the family Ophidiidæ.
    • ***
Chambers's Twentieth Century Dictionary
    • Rockling a genus of fishes of the cod family Gadidæ, of which several species frequent the British seas
    • ***


Chambers's Twentieth Century Dictionary
O. Fr. roke, roche; prob. Celt., as in Gael. roc, W. rhwg, a projection.


In literature:

At Rockling Station I saw some very fine orange trees, full of splendid fruit.
"A start in life" by C. F. Dowsett
The fishes best adapted for tank life are the queer-looking gobies, the lively blennies, small specimens of wrasse, rockling, and eel.
"The Book of the Aquarium and Water Cabinet" by Shirley Hibberd