Ential Calculus, Integral Calculus.

Flux'ional, Flux'ionary, a. Pertaining to, or solved by, fluxions. - Temporary; inconstant; variable. Flux'ionist, n. One skilled in fluxions. Fly, v. n. ( imp . FLEW: PP . FLOWN.) [A. S. fleogan; Ger. fliegen, to move in the air.] To move or sail through the air by the aid of wings, as a bird. - To float or move in the air; to pa through the air. "Sparks Ay up- ward." ( Job v.)-To move or pa with velocity or celer- ity, either on land or water; to move rapidly in any manner. To break or part suddenly; to burst; to spring by an elastic force. - To run away; to escape; to attempt to escape. "The flying prey." - Spenser. To fly at , to spring with violence upon; to fall on sud- denly. - To fly in the face of , to insult; to a ail; to attack violently; to act in defiance of; as, " to fly in na- ture's face." (Dryden.) To fly off , to depart suddenly; to revolt. To fly out , to burst into pa ion; to break out into license; to start violently in any direction. let fly , to discharge; as, to let fly a volley. - ( Naut . ) To let go suddenly; as, to let fly the jib-sheets. - To come off with flying colors , to be succe ful. -v. a. To To quit by flight; to shun; to avoid; to decline a ociation with; as, "sleep flies the wretch." Dryden. -To cause to fly or float; to attack by a bird of prey; as, to fly a flag. "To fly other ravening fowl with a falcon." Bacon .