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| a white, crystalline, water-insoluble, powerful high explosive, C3H6N6O6, used chiefly in bombs and shells. |
| (used as a nonsense word by children to express approval or to represent the longest word in English.) |
| dinosaur (ˈdaɪnəˌsɔː) | |
| —n | |
| 1. | saurischian See also ornithischian pterosaur Compare plesiosaur any extinct terrestrial reptile of the orders Saurischia and Ornithischia, many of which were of gigantic size and abundant in the Mesozoic era |
| 2. | a person or thing that is considered to be out of date |
| [C19: from New Latin dinosaurus, from Greek deinos fearful + sauros lizard] | |
| dino'saurian | |
| —adj | |