1. the positions of the moon when it is 90 degrees from the sun as seen from Earth
Usage: astronomy
2. the mathematical process of finding the area under a curve
Usage: mathematics

Examples

• The moon reaches quadratures twice during each lunar month.
• During quadratures, we see exactly half of the moon’s illuminated surface.
• The first and third quarters of the moon occur at quadratures.
• Numerical quadratures help approximate definite integrals.
• Students learn various quadratures techniques in calculus class.
• Gaussian quadratures provide efficient methods for numerical integration.