(mathematics) A surface or curve whose shape is defined in terms of a quadratic equation

(mathematics) Of or relating to the second degree; quadratic.

plural of quadric

(mathematics) The lines of a 3-dimensional projective space, S, can be viewed as points of a 5-dimensional projective space, T. In that 5-space, the points that represent each line in S lie on a hyperbolic quadric, Q, known as the Klein quadric.

plural of Klein quadric

(anatomy) In human anatomy, a tendon that connects the quadriceps femoris muscles to the superior aspects of the patella on the anterior of the thigh.

(anatomy) A muscle having four heads, especially the large extensor at the front of the thigh.

Relating to a 400th anniversary.

A 400th anniversary.

plural of quadricentennial