EFFECTIVE a.
t; serviceable; operative; as, an effective force, remedy, speech; the effective men in a regiment. They are not effective of anything, nor leave no work behind them. Bacon. Whosoever is an effective, real cause of doing his heighbor wrong, is criminal. Jer. Taylor.
FLANK n.
The side of an army, or of any division of an army, as of a brigade, regiment, or battalion; the extreme right or left; as, to attack an enemy in flank is to attack him on the side. When to right and left the front Divided, and to either flank retired. Milton.