adj., n., & v.
adj. esp. Anat. & Zool. square or rectangular (quadrate bone; quadrate muscle).
n. 1 a quadrate bone or muscle. 2 a rectangular object.
v. 1 tr. make square. 2 intr. & tr. (often foll. by with) conform or make conform.
[ ME f. L quadrare quadrat- make square f. quattuor four ]