apsis

noun ap·sis \ˈap-səs\

plural ap·si·des \-sə-ˌdēz\

Definition of APSIS

: the point in an astronomical orbit at which the distance of the body from the center of attraction is either greatest or least

: apse 2

New Latin apsid-, apsis, from Latin, arch, orbit, from Greek hapsid-, hapsis, from haptein to fasten

First Known Use: 1601

Next Word in the Dictionary: apt (adjective)Previous Word in the Dictionary: apsidioleAll Words Near: apsis

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