vestibulo-ocular reflex
Concise Oxford English Dictionary © 2008 Oxford University Press:
vestibulo-ocular reflex /vɛˌstɪbjʊləʊˈɒkjʊlə/
▶noun the reflex by which the direction of the eyes remains constant when the head is moved.
'vestibulo-ocular reflex' also found in these Oxford entries:

