perihelianadj.

Brit.

/ˌpɛrɪˈhiːlɪən/, U.S.

/ˌpɛrəˈhiljən/,

/ˌpɛrəˈhiliən/

Origin: Formed within English, by derivation. Etymons: perihelion n., -an suffix.

Etymology: < periheli- (in perihelion n.) + -an suffix. Compare perihelial adj.

Astronomy. Now rare.

Of or relating to the perihelion of a planet, comet, etc.

ΘΚΠ

the world > the universe > heavenly body > movement of heavenly bodies > [adjective] > movement in orbit > parts of orbit

perihelian1690

aphelian1739

perihelial1785

periastral1872

pericentric1888

1690 W. Leybourn Cursus mathematicus f. 772 As is the Aphelian Distance of the Planet to the Perihelian Distance.

1739 Philos. Trans. 1737–8 (Royal Soc.) 40 220 The Perihelian Distance..is many times less than the Semi-distance of the Foci.

1838 Southern Literary Messenger Feb. 125/1 If the perihelian distance exceeds the distance of the earth from the sun, the orbit of the comet..must include that of the earth.

1909 Science 10 Dec. 855/2 The time of perihelian passage [of Halley's comet]..seems to require the correction of 3.4 days.

1975 Jrnl. Royal Statist. Soc. B. 37 391 It is worth while to look into further models which would take into account not only perihelian directions but also the other astronomical coordinates.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	perihelian
释义	perihelianadj. Brit. /ˌpɛrɪˈhiːlɪən/, U.S. /ˌpɛrəˈhiljən/, /ˌpɛrəˈhiliən/ Origin: Formed within English, by derivation. Etymons: perihelion n., -an suffix. Etymology: < periheli- (in perihelion n.) + -an suffix. Compare perihelial adj. Astronomy. Now rare. Of or relating to the perihelion of a planet, comet, etc. ΘΚΠ the world > the universe > heavenly body > movement of heavenly bodies > [adjective] > movement in orbit > parts of orbit perihelian1690 aphelian1739 perihelial1785 periastral1872 pericentric1888 1690 W. Leybourn Cursus mathematicus f. 772 As is the Aphelian Distance of the Planet to the Perihelian Distance. 1739 Philos. Trans. 1737–8 (Royal Soc.) 40 220 The Perihelian Distance..is many times less than the Semi-distance of the Foci. 1838 Southern Literary Messenger Feb. 125/1 If the perihelian distance exceeds the distance of the earth from the sun, the orbit of the comet..must include that of the earth. 1909 Science 10 Dec. 855/2 The time of perihelian passage [of Halley's comet]..seems to require the correction of 3.4 days. 1975 Jrnl. Royal Statist. Soc. B. 37 391 It is worth while to look into further models which would take into account not only perihelian directions but also the other astronomical coordinates. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < adj.1690
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