(zoology) Any insect of the order Diptera; characterized by having two wings (except for some wingless species), also called true flies.
(non-technical) Especially, any of the insects of the family Muscidae, such as the common housefly (other families of Diptera include mosquitoes and midges).
(weightlifting) An exercise that involves wide opening and closing of the arms perpendicular to the shoulders.
The part of a vane pointing the direction from which the wind blows.
(nautical) That part of a compass on which the points are marked; the compass card.
Two or more vanes set on a revolving axis, to act as a fanner, or to equalize or impede the motion of machinery by the resistance of the air, as in the striking part of a clock.
A heavy wheel, or cross arms with weights at the ends on a revolving axis, to regulate or equalize the motion of machinery by means of its inertia, where the power communicated, or the resistance to be overcome, is variable, as in the steam engine or the coining press. See fly wheel.
In a knitting machine, the piece hinged to the needle, which holds the engaged loop in position while the needle is penetrating another loop; a latch.
