anthelion

noun, plural ant·he·li·a [ant-hee-lee-uh, an-thee-] /æntˈhi li ə, ænˈθi-/.

1. a luminous, white spot occasionally appearing at the sun’s elevation but in the opposite part of the sky.

noun plural -lia (-lɪə)

1. a faint halo sometimes seen in polar or high altitude regions around the shadow of an object cast onto a thick cloud bank or fog
2. a white spot occasionally appearing on the parhelic circle at the same height as and opposite to the sun

Plural anthelia

1. A bright white or colored spot appearing at times in the sky opposite the Sun. White anthelia are believed to form from light that is reflected off atmospheric ice crystals; colored anthelia are believed to form from light that is refracted by atmospheric ice crystals. Compare parhelion.