conodont

n. 牙形刺、牙形石

學術名詞

• 牙形石：海洋科學、海洋地質學
• 牙形刺：海洋科學、海洋地質學
• 有牙動物：生命科學
• 牙形動物：生命科學
• 牙形蟲：地質學

英文釋義

1. the tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodonta
2. small (2 inches long) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone; late Cambrian to late Triassic; possible predecessor of the cyclostomes