† ˈtredecile, a. or n. Astrol. Obs.
Also -il.
[ad. mod.L. tredecīl-is, f. L. trēs three + dec-em ten; cf. quartile, sextile.]
Denoting an aspect, introduced by Kepler, in which the planets are 3/10 of a circle, i.e. 108°, apart. Cf. decile.
| 1647 Lilly Chr. Astrol. iii. 32 Of late one Kepler, a learned man, hath added some new ones as follow..A Tredecile..consisting of 108 degrees. 1674 S. Jeake Arith. (1696) 11 Aspects... Sesquiquintil or Tredecil. 1727–41 Chambers Cycl., Aspect, To the five ancient aspects, the modern writers have added several more; as decile,..tridecile,..[etc.]. 1819 J. Wilson Compl. Dict. Astrol. 101 The new aspects invented by Kepler are mostly produced by sub⁓dividing the others... The Tredecile, of 108°, is a quintile and half, or three deciles... Those arising from a division of the △ or {star} by 5 were [thought by Kepler to be] good; thus..the tredecile, being a quintile and a half, is good. |