| 单词 | Caytonia | 
| 释义 | Caytonianoun  Cay·to·nia   kāˈtōnēə, -nyə   : a genus (the type of the family Caytoniaceae and the order Caytoniales) of fossil gymnospermous plants of the Mesozoic era having seeds enclosed in a carpellike case that suggests their ancestry to the angiosperms   | 
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