English-Thai Dictionary

sidereal

ADJ เกี่ยวกับ ดาวฤกษ์  kiao-kab-dao-lok

 

Webster's 1913 Dictionary

SIDEREAL

Si *de "re *al, a. Etym: [L. sidereus, from sidus, sideris, a constellation, a star. Cf. Sideral, Consider, Desire. ]

 

1. Relating to the stars; starry; astral; as, sidereal astronomy.

 

2. (Astron.)

 

Defn: Measuring by the apparent motion of the stars; designated, marked out, or accompanied, by a return to the same position in respect to the stars; as, the sidereal revolution of a planet; a sidereal day. Sidereal clock, day, month, year. See under Clock, Day, etc. -- Sideral time, time as reckoned by sideral days, or, taking the sidereal day as the unit, the time elapsed since a transit of the vernal equinox, reckoned in parts of a sidereal day. This is, strictly, apparent sidereal time, mean sidereal time being reckoned from the transit, not of the true, but of the mean, equinoctial point.

 

SIDEREALIZE

SIDEREALIZE Si *de "re *al *ize, v. t.

 

Defn: To elevate to the stars, or to the region of the stars; to etherealize. German literature transformed, siderealized, as we see it in Goethe, reckons Winckelmann among its initiators. W. Pater.

 

New American Oxford Dictionary

sidereal

si de re al |sīˈdi (ə )rēəl saɪˈdɪriəl | ▶adjective of or with respect to the distant stars (i.e., the constellations or fixed stars, not the sun or planets ). ORIGIN mid 17th cent.: from Latin sidereus (from sidus, sider- ‘star ’) + -al .

 

sidereal clock

si de re al clock ▶noun Astronomy a clock measuring sidereal time in terms of 24 equal divisions of a sidereal day.

 

sidereal day

si de re al day ▶noun Astronomy the time between two consecutive transits of the First Point of Aries. It represents the time taken by the earth to rotate on its axis relative to the stars, and is almost four minutes shorter than the solar day because of the earth's orbital motion.

 

sidereal month

si de re al month ▶noun Astronomy the time it takes the moon to orbit once around the earth with respect to the stars (approximately 27 1 /4 days ).

 

sidereal period

si de re al pe ri od ▶noun Astronomy the period of revolution of one body around another with respect to the distant stars.

 

sidereal time

si de re al time ▶noun Astronomy time reckoned from the motion of the earth (or a planet ) relative to the distant stars (rather than with respect to the sun ).

 

sidereal year

si de re al year ▶noun Astronomy the orbital period of the earth around the sun, taking the stars as a reference frame, being 20 minutes longer than the tropical year because of precession.

 

Oxford Dictionary

sidereal

sidereal |sʌɪˈdɪərɪəl | ▶adjective of or with respect to the distant stars (i.e. the constellations or fixed stars, not the sun or planets ). ORIGIN mid 17th cent.: from Latin sidereus (from sidus, sider- ‘star ’) + -al .

 

sidereal clock

si |der ¦eal clock ▶noun Astronomy a clock measuring sidereal time in terms of 24 equal divisions of a sidereal day.

 

sidereal day

si |der ¦eal day ▶noun Astronomy the time between two consecutive transits of the First Point of Aries. It represents the time taken by the earth to rotate on its axis relative to the stars, and is almost four minutes shorter than the solar day because of the earth's orbital motion.

 

sidereal month

si |der ¦eal month ▶noun Astronomy the time it takes the moon to orbit once around the earth with respect to the stars (approximately 27 1 /4 days ).

 

sidereal period

si |der ¦eal period ▶noun Astronomy the period of revolution of one body about another with respect to the distant stars.

 

sidereal time

si |der ¦eal time ▶noun [ mass noun ] Astronomy time reckoned from the motion of the earth (or a planet ) relative to the distant stars (rather than with respect to the sun ).

 

sidereal year

si |der ¦eal year ▶noun Astronomy the orbital period of the earth around the sun, taking the stars as a reference frame. It is 20 minutes longer than the tropical year because of precession.

 

Sanseido Wisdom Dictionary

sidereal

si de re al /saɪdɪ́ ə riəl /形容詞 (恒 )星の (運行による ); 星座の ▸ a sidereal day 恒星日 〘23時間56分4.09秒 〙▸ a sidereal year 恒星年 〘365日6時間9分9.54秒 〙.