hilus
Concise Oxford English Dictionary © 2008 Oxford University Press:
hilus /ˈhʌɪləs/
▶noun (pl. hili /ˈhʌɪlʌɪ/) Anatomy an indentation in the surface of a kidney or other organ, where blood vessels, nerve fibres, etc. enter or leave it.
'hilus' also found in these Oxford entries:

