(calculus) A differential equation that involves the partial derivatives of a function of several variables.

(US, Canada) A variation on the cloverleaf interchange in which there are fewer loop ramps.

(set theory, order theory, loosely) A set that has a given, elsewhere specified partial order. / (set theory, order theory, formally) The ordered pair comprising a set and its partial order.

(set theory) A partial order.

plural of partial differential equation

plural of partial ordering relation

plural of partially ordered set

(US, law, colloquial) intact dilation and extraction

(linguistics, uncommon) A word in a language bearing a deceptive resemblance to a word in another language, and at least one meaning in common, but not all.

plural of partial-birth abortion