† sesquiˈalteran, a. Obs.
[Formed as prec. + -an.]
= sesquialter 1.
| 1653 R. Sanders Physiogn. 271 Here you may finde the Double proportion, the sesquialteran, the sesquitertian. 1715 tr. Gregory's Astron. (1726) I. 137 That the Periodic Times of the Planets will be exactly in the Sesquialteran Proportion of their Orbits or Circles. |