equantadj.n.

/ˈiːkwənt/

Forms: Also 1600s æquant.

Etymology: < Latin aequant-em, present participle of aequāre to make equal, < aequus equal.

Astronomy. Obsolete exc. Historical.

A. adj.

That equalizes. equant circle n. [medieval Latin circulus aequans] a circle imagined by the ancient astronomers for the purpose of reducing the planetary movements to consistency with the hypothesis that celestial motion must be uniform in velocity; also figurative.

ΘΚΠ

the world > the universe > planet > planetary movement > [noun] > orbit > older astronomy

equant circle1621

1621 R. Burton Anat. Melancholy ii. ii. iii. 324 Excentricke, concentricke, circles æquant &c. are absurd.

1632 R. Burton Anat. Melancholy (ed. 4) iii. i. iii. 422 Loue is the circle æquant of all other affections.

1796 in C. Hutton Math. & Philos. Dict.

B. n.

1. = equant circle n. at sense A.

ΚΠ

1834 Nat. Philos. (Libr. Useful Knowl.) III. Hist. Astron. vi. 31/1 He [sc. Ptolemy] was compelled to suppose that..the centre of the equant..revolved in a small circle round the centre of the excentric.

2. Used for ‘centre of the equant’.

ΚΠ

1837 W. Whewell Hist. Inductive Sci. I. iii. iv. 221 About another point, the equant.

This entry has not yet been fully updated (first published 1891; most recently modified version published online December 2021).

单词	equant
释义	equantadj.n. /ˈiːkwənt/ Forms: Also 1600s æquant. Etymology: < Latin aequant-em, present participle of aequāre to make equal, < aequus equal. Astronomy. Obsolete exc. Historical. A. adj. That equalizes. equant circle n. [medieval Latin circulus aequans] a circle imagined by the ancient astronomers for the purpose of reducing the planetary movements to consistency with the hypothesis that celestial motion must be uniform in velocity; also figurative. ΘΚΠ the world > the universe > planet > planetary movement > [noun] > orbit > older astronomy equant circle1621 1621 R. Burton Anat. Melancholy ii. ii. iii. 324 Excentricke, concentricke, circles æquant &c. are absurd. 1632 R. Burton Anat. Melancholy (ed. 4) iii. i. iii. 422 Loue is the circle æquant of all other affections. 1796 in C. Hutton Math. & Philos. Dict. B. n. 1. = equant circle n. at sense A. ΚΠ 1834 Nat. Philos. (Libr. Useful Knowl.) III. Hist. Astron. vi. 31/1 He [sc. Ptolemy] was compelled to suppose that..the centre of the equant..revolved in a small circle round the centre of the excentric. 2. Used for ‘centre of the equant’. ΚΠ 1837 W. Whewell Hist. Inductive Sci. I. iii. iv. 221 About another point, the equant. This entry has not yet been fully updated (first published 1891; most recently modified version published online December 2021). < adj.n.1621
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