anthelion
Concise Oxford English Dictionary © 2008 Oxford University Press:
anthelion /antˈhiːlɪən, anˈθiːl-/
▶noun (pl. anthelia /-lɪə/) a luminous halo round a shadow projected by the sun on to a cloud or fog bank.
■ a parhelion seen opposite the sun in the sky.
– origin C17: from Gk anthēlios ‘opposite to the sun’.
'anthelion' also found in these Oxford entries:

