[せきどうざひょう, sekidouzahyou] (n) equatorial coordinates [Add to Longdo]
Result from Foreign Dictionaries (3 entries found)
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Equatorial \E`qua*to"ri*al\, a. [Cf. F. ['e]quatorial.]
Of or pertaining to the equator; as, equatorial climates;
also, pertaining to an equatorial instrument.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Equatorial \E`qua*to"ri*al\, n. (Astron.)
An instrument consisting of a telescope so mounted as to have
two axes of motion at right angles to each other, one of them
parallel to the axis of the earth, and each carrying a
graduated circle, the one for measuring declination, and the
other right ascension, or the hour angle, so that the
telescope may be directed, even in the daytime, to any star
or other object whose right ascension and declination are
known. The motion in right ascension is sometimes
communicated by clockwork, so as to keep the object
constantly in the field of the telescope. Called also an
{equatorial telescope}.
[1913 Webster]
Note: The term equatorial, or equatorial instrument, is
sometimes applied to any astronomical instrument which
has its principal axis of rotation parallel to the axis
of the earth.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
equatorial
adj 1: of or relating to or at an equator; "equatorial diameter"
2: of or relating to conditions at the geographical equator;
"equatorial heat"
3: of or existing at or near the geographic equator; "equatorial
Africa" [ant: {polar}]
n 1: a telescope whose mounting has only two axes of motion, one
parallel to the Earth's axis and the other one at right
angles to it
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