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apsides
We have found lemma(root) word of apsides : apsis.
Definitions
[ˈapsɪs], (Noun)
Definitions:
- either of two points on the orbit of a planet or satellite that are nearest to or furthest from the body round which it moves
Phrases:
Origin
:
early 17th century (denoting the orbit of a planet): via Latin from Greek apsis, hapsis ‘arch, vault’, perhaps from haptein ‘fasten, join’. Compare with apse
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definition by Oxford Dictionaries