Equant (or punctum aequans) is a mathematical concept developed by Claudius Ptolemy in the 2nd century AD to account for the observed motion of the planets. The equant is used to explain the observed speed change in planetary orbit during different stages of the orbit. This planetary concept allowed Ptolemy to keep the theory of uniform circular m...
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• (n.) A circle around whose circumference a planet or the center of ann epicycle was conceived to move uniformly; -- called also eccentric equator.
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(from the article `Ptolemaic system`) ...when at perigee. Ptolemy enhanced the effect of eccentricity by making the epicycle`s centre sweep out equal angles along the deferent in equal ... ...three mechanisms: uniformly revolving, off-centre circles called eccentrics; epicycles, little circles whose centres moved uniformly on the ... ...
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http://www.britannica.com/eb/a-z/e/38
Synonym of equidimensional
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E'quant noun [ Latin
aequans ,
-antis , present participle of
aequare : confer French
équant . See
Equate .]
(Ptolemaic Astron.) A circle around whose circumference a planet or the center of ann epicycle was conceived to move uniformly; -- called also
ecc...Found on
http://www.encyclo.co.uk/webster/E/59
(of a crystal) having all axes of the same length (opposed to anisometric).
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No exact match found.
