Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Astronomy The point in an orbit around the planet Earth where the orbiting body is closest to the planet.
  • noun The analogous point in an orbit around a celestial body other than Earth. Not in technical use.

from The Century Dictionary.

  • noun That point of the moon's orbit which is nearest to the earth: when the moon has arrived at this point, she is said to be in her perigee.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Astron.) That point, in the orbit of the moon or other body orbiting the earth, which is nearest to the earth; -- opposed to apogee. It is sometimes, but rarely, used of the nearest points of bodies not orbiting the earth, such as of a comet, a planet, etc. Called also epigee, epigeum.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun astronomy The point, in an orbit about the Earth, that is closest to the Earth: the periapsis of an Earth orbiter.
  • noun astronomy, more generally The point, in an orbit about any planet, that is closest to the planet: the periapsis of any satellite.
  • noun The point, in any trajectory of an object in space, where it is closest to the Earth.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun periapsis in Earth orbit; the point in its orbit where a satellite is nearest to the Earth

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[French périgée, from Medieval Latin perigēum, from Late Greek perigeion : Greek peri-, peri- + Greek , earth.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Via Latin perigeum, perigaeum, ultimately from Ancient Greek περί (peri, "near") + γῆ (gē, "Earth").

Examples

Comments

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  • simply nice, especially when combined with apogee

    April 19, 2007