Webster's Revised Unabridged Dictionary · 1913

Sextile

Sextile , adjective

[French sextil, from Latin sextus the sixth, from sex six. See Six.]

(Astrology) Measured by sixty degrees; fixed or indicated by a distance of sixty degrees. — Glanvill

Sextile , noun

[Compare French aspect sextil.]

(Astrology) The aspect or position of two planets when distant from each other sixty degrees, or two signs. This position is marked thus: <8star/. — Hutton