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The Collaborative International Dictionary
Perihelion

Perihelion \Per`i*hel"ion\, Perihelium \Per`i*he"li*um\, n.; pl. Perihelia. [NL., fr. Gr. ? about, near + ? the sun.] (Astron.) That point of the orbit of a planet or comet which is nearest to the sun; -- opposed to aphelion.

Douglas Harper's Etymology Dictionary
perihelion

"point at which a celestial body is nearest the Sun," 1680s, coined in Modern Latin (perihelium) by Kepler (1596) from Latinizations of Greek peri "near" (see peri-) + helios "sun" (see sol). Subsequently re-Greeked.

Wiktionary
perihelion

n. (context astronomy English) The point in the elliptical orbit of a planet or comet etc. where it is nearest to the Sun.

WordNet
perihelion
  1. n. periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun [ant: aphelion]

  2. [also: perihelia (pl)]

Wikipedia
Perihelion (disambiguation)

Perihelion is the point of closest approach to the Sun of a body orbiting the Sun.

Perihelion may also refer to:

  • Perihelion: The Prophecy, a 1993 role-playing video game for the Amiga computer
  • Perihelion Software, a British software company
  • Isaac Asimov's Robot City: Perihelion, a 1988 novel by William F. Wu
  • Perihelion, a short story by Dan Abnett for the Warhammer 40,000 universe

Usage examples of "perihelion".

According to Jase, Perihelion was about to be transformed from an aerospace think tank into an official advisory body, with real authority to shape policy.

One of these days, Perihelion is going to vet candidates for some extremely rugged homesteading.

Later I would learn a great deal more about the Perihelion Foundation and the work Jason did for it.

Lawton was managing from his Washington office and Jason was designing at Perihelion in Florida: Spin investigations, including, lately, the Mars effort.

A at Perihelion but had cleared his schedule prior to the launches, which he wanted to witness without a CNN crew dunning him with boneheaded questions.

I used my Perihelion ID and my connection with Jase to rent us two neighboring suites in a Holiday Inn with a view toward Canaveral.

I should have, nursing my wounded dignity, embedded in the noise and laughter from nearby rooms, flunking about all the scientists and engineers at Perihelion and JPL and Kennedy, all these newspaper people and video journalists watching klieg lights play over the distant rockets, all of us doing our jobs here at the tag end of human history, doing what was expected of us, playing it like it mattered.

The media mobbed Canaveral again, but I watched this round on a big digital projection in the auditorium at Perihelion, a sunshine launch that scattered herons into the sky over Merritt Island like bright confetti.

By September every office at Perihelion was plastered with high-res images of our success.

If anything dismayed him it was his own emergence as the iconic genius of the Perihelion Foundation, or at least its scientific celebrity, poster child for the transformation of Mars.

Perihelion to have a human face, preferably young, smart but not intimidating, and he had been pushing Jase in front of cameras since the days when Perihelion was an aerospace lobby group.

Molly Seagram waved her hand at a magazine on the reception desk as I entered the Perihelion infirmary.

And as acting director of the Perihelion Foundation he has powerfully influenced American and global aerospace policy in the Spin era.

Spin, his virtual adoption by three successive presidential administrations, the creation of the Perihelion Foundation.

A decade ago the relationship was formalized and a subtly reorganized Perihelion was officially annexed to NASA as an advisory body.