Webster's Revised Unabridged Dictionary · 1913

Pinfish

Pinfish , noun

[So called from their sharp dorsal spines.]

(a)
(Zoology) The sailor's choice (Diplodus rhomboides syn. Lagodon rhomboides).
(b)
(Zoology) The salt-water bream (Diplodus Holbrooki).

Both are excellent food fishes, common on the coast of the United States south of Cape Hatteras. The name is also applied to other allied species.