ganoin

Found in Anh - Anh (Wordnet)

Definition Noun : * A shiny, hard, enamel-like substance that forms the outer layer of the scales in certain primitive fishes, such as gars and sturgeons. It is secreted by the dermis (corium). Usage Ganoin is a specific biological and zoological term. It is used almost exclusively in scientific contexts to describe the unique scale structure of ganoid fish. * The fossilized scale retained its...