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periapsis

noun
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peri·​apsis | \ ¦perē+ \

Definition of periapsis

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

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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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The first known use of periapsis was in 1959

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Cite this Entry

“Periapsis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/periapsis. Accessed 16 Jun. 2021.

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