1 periapsis | Definition of periapsis
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periapsis

noun
peri·​apsis | \ ¦perÄ“+\

Definition of periapsis

: the apsis nearest the center of attraction : the low point in an orbit — compare apoapsis

First Known Use of periapsis

1959, in the meaning defined above

History and Etymology for periapsis

New Latin, from peri- + apsis

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