I. ˈga-ˌnȯid adjective
Etymology: ultimately from Greek ganos brightness; akin to Greek gēthein to rejoice — more at joy
Date: circa 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
II. noun
Date: circa 1839
: a fish (as a sturgeon or gar) with ganoid scales