| Noun | 1. | green dinosaur - a living fossil or so-called `green dinosaur'; genus or subfamily of primitive nut-bearing trees thought to have died out 50 million years ago; a single specimen found in 1994 on Mount Bartle Frere in eastern Australia; not yet officially nameddicot genus, magnoliopsid genus - genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination family Proteaceae, protea family, Proteaceae - large family of Australian and South African shrubs and trees with leathery leaves and clustered mostly tetramerous flowers; constitutes the order Proteales | |