单词 | Pachycephalosauridae |
释义 | Pachycephalosauridae [´pak·ǝ´sef·ǝ·lǝ`sȯr·ǝ´dē] PALEONTOLOGY A family of ornithischian dinosaurs characterized by a skull with a solid rounded mass of bone 4 inches (10 centimeters) thick above the minute brain cavity. |
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