EQUATORIALLY

Etymology

Adverb

equatorially (comparative more equatorially, superlative most equatorially)

In an equatorial direction

Source: Wiktionary


E`qua*to"ri*al*ly, adv.

Definition: So as to have motion or direction parallel to the equator.

EQUATORIAL

E`qua*to"ri*al, a. Etym: [Cf. F. équatorial.]

Definition: Of or pertaining to the equator; as, equatorial climates; also, pertaining to an equatorial instrument.

E`qua*to"ri*al, n. (Astron.)

Definition: 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.

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.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

10 June 2025

COMMUNICATIONS

(noun) the discipline that studies the principles of transmiting information and the methods by which it is delivered (as print or radio or television etc.); “communications is his major field of study”


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Coffee Trivia

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