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periapsis

noun
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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Dictionary Entries near periapsis

periagua

periaktos

perianth

periapsis

periapt

Periarctic

periastron

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The first known use of periapsis was in 1959

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