20-letter words containing q, a, i
- squatter sovereignty — (used contemptuously by its opponents) popular sovereignty (def 2).
- tchebycheff equation — a differential equation of the form (1 − x 2) d 2 y/dx 2 − x dy/dx + n 2 y = 0, where n is any nonnegative integer.
- universal quantifier — a quantifier indicating that the sentential function within its scope is true for all values of any variable included in the quantifier.
- vitoria de conquista — a city in Bahía state, E central Brazil.