| 单词 | Psammodontidae |
| 释义 | Psammodontidae [´sam·ǝ`dänt·ǝ´dē] PALEONTOLOGY A family of extinct cartilaginous fishes in the order Bradyodonti in which the upper and lower dentitions consisted of a few large quadrilateral plates arranged in two rows meeting in the midline. |
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