apoapsis

noun

apo·​apsis

¦apō +

plural apoapses or apoapsides

" +

: the apsis that is farthest from the center of attraction : the high point in an orbit compare periapsis

Word History

Etymology

New Latin, from apo- + apsis

First Known Use

1876, in the meaning defined above

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!