apocenter

English

Etymology tree

Proto-Indo-European *h₂ep

Proto-Indo-European *-o

Proto-Indo-European *h₂epó

Proto-Hellenic *apó

Ancient Greek ᾰ̓πό (ăpó)

Ancient Greek ᾰ̓πο- (ăpo-)bor.

English apo-

Proto-Indo-European *ḱent-der.

Ancient Greek κέντρον (kéntron)der.

Latin centrumder.

Middle French centrebor.

Middle English center

English center

English apocenter

From apo- + center.

apocenter (plural apocenters)

(astronomy) The furthest point of an astronomical object in an elliptical orbit to its center of attraction (the principal focus of the ellipse)

the point in an orbit furthest from the center of attraction