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...

Found on http://en.wikipedia.org/wiki/Equant

Synonym of equidimensional

Found on http://www.encyclo.co.uk/local/22291

• (n.) A circle around whose circumference a planet or the center of ann epicycle was conceived to move uniformly; -- called also eccentric equator.

Found on http://thinkexist.com/dictionary/meaning/equant/

(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 ... ...

Found on http://www.britannica.com/eb/a-z/e/38

**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

**No exact match found**