n.
Pronunciation: ˌ per- ə - ' h ē l-y ə n
Function: noun
Inflected Form: plural -he · lia \ - ' h ē l-y ə \
Etymology: New Latin, from peri- + Greek h ē lios sun ― more at SOLAR
Date: 1666
: the point in the path of a celestial body (as a planet) that is nearest to the sun ― compare APHELION
– peri · he · lial \ - ' h ē l-y ə l \ adjective