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Definitions3 characters
ru3 tu1 dou4
mastoid antrum (bones at the back of tympanic chamber)
Usage•••frequent
Pronunciations

As word

1
ru3
mastoid antrum (bones at the back of tympanic chamber)
2
tu1
mastoid antrum (bones at the back of tympanic chamber)
3
dou4
mastoid antrum (bones at the back of tympanic chamber)