aye-aye
Concise Oxford English Dictionary © 2008 Oxford University Press:
aye-aye /ˈʌɪʌɪ/
▶noun a rare nocturnal Madagascan primate related to the lemurs. [Daubentonia madagascariensis.]
– origin C18: from Fr., from Malagasy aiay.
'aye-aye' also found in these Oxford entries:

