In astrology, a sesquisquare is a minor aspect formed when two planets or other chart factors are approximately 135 degrees apart. It is commonly associated with tension, recurring pressure, resistance, adjustment, and refinement between the factors involved. Its influence may be subtler than that of a square, but it can still point to patterns that become noticeable through repeated friction or the need for ongoing response. Its meaning depends on the planets or points involved, their signs and houses, the size of the orb, and how the aspect fits within the larger chart pattern.