1. sesquiquadrate - Noun
2. sesquiquadrate - Adjective
sesquiquadrate (not comparable)
(astrology) Of or noting the aspect or position of any two celestial bodies separated by 135°.
sesquiquadrate (plural sesquiquadrates)
(astronomy) A sesquiquadrate aspect or position; an angle of 135°: (a square [90°] + a semisquare [45°]; abbrv. Ses).