palaeocastorid
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English
[edit]![](http://upload.wikimedia.org/wikipedia/commons/thumb/8/8f/Palaeocastor.jpg/220px-Palaeocastor.jpg)
Etymology
[edit]palaeo- + castorid, influenced by translingual Palaeocastor.
Noun
[edit]palaeocastorid (plural palaeocastorids)
- Any extinct prehistoric beaver of the genus Palaeocastor.