English-Thai Dictionary
perihelion
N ตำแหน่ง โคจร ของ ดาวนพเคราะห์ ที่อยู่ ใกล้ ดวงอาทิตย์ ที่สุด near approach perigee tam-nang-kong-dao-nob-pa-kor-ti-kai-dui-ar-tid-ti-sud
Webster's 1828 Dictionary
PERIHELION, PERIHELIUM
n.[Gr. about, and the sun. ] That part of the orbit of a planet or comet, in which it is at its least distance from the sun; opposed to aphelion.
Webster's 1913 Dictionary
PERIHELION; PERIHELIUM
Per `i *hel "ion, Per `i *he "li *um, n.; pl. Perihelia. Etym: [NL. , fr. Gr. (Astron.)
Defn: That point of the orbit of a planet or comet which is nearest to the sun; -- opposed to Ant: aphelion.
New American Oxford Dictionary
perihelion
per i he li on |ˌperəˈhēlyən, -ˈhēlēən ˌpɛrəˈhiljən | ▶noun ( pl. perihelia |-ˈhēlyə, -ˈhēlēə | or perihelions ) Astronomy the point in the orbit of a planet, asteroid, or comet at which it is closest to the sun. The opposite of aphelion. ORIGIN mid 17th cent.: alteration of modern Latin perihelium (by substitution of the Greek ending -on ), from Greek peri- ‘around ’ + hēlios ‘sun. ’
Oxford Dictionary
perihelion
perihelion |ˌpɛrɪˈhiːlɪən | ▶noun ( pl. perihelia |-lɪə | ) Astronomy the point in the orbit of a planet, asteroid, or comet at which it is closest to the sun. The opposite of aphelion. ORIGIN mid 17th cent.: alteration of modern Latin perihelium (by substitution of the Greek inflection -on ), from Greek peri- ‘around ’ + hēlios ‘sun ’.
The Wordsmith Dictionary