[gan.oid] adj [ultim. fr. Gk ganos brightness; akin to Gk gethein to rejoice--more at joy] (ca. 1847): of, having, or being fish scales consisting of bone and an outer shiny layer resembling enamel; also: relating to or being fish with ganoid scales
[2]ganoid n (ca. 1839): a fish (as a sturgeon or gar) with ganoid scales