tinnitus
Concise Oxford English Dictionary © 2008 Oxford University Press:
tinnitus /tɪˈnʌɪtəs, ˈtɪnɪtəs/
▶noun Medicine ringing or buzzing in the ears.
– origin C19: from L., from tinnire ‘to ring, tinkle’, of imitative origin.
'tinnitus' also found in these Oxford entries:

