a small bird that imitates the lowing of oxen
1bittern — bittern1 [bit′ərn] n. pl. bitterns or bittern [ME bitor < OFr butor < VL * butitaurus < L butio, bittern (< echoic base * bu ) + taurus, small bird that imitates the lowing of oxen, lit., bull: see STEER1] any of a subfamily… …
