A contraceptive device consisting of a flexible cup, used to cover the cervix during intercourse.
In a speaker, the thin, semi-rigid membrane which vibrates to produce sound.
A thin opaque structure with a central aperture, used to limit the passage of light into a camera or similar device.
Any of various membranes or sheets of muscle or ligament which separate one cavity from another.
A floor slab, metal wall panel, roof panel or the like, having a sufficiently large in-plane shear stiffness and sufficient strength to transmit horizontal forces to resisting systems.
A flexible membrane separating two chambers and fixed around its periphery that distends into one or other chamber as the difference in the pressure in the chambers varies.
In mammals, a sheet of muscle separating the thorax from the abdomen, contracted and relaxed in respiration to draw air into and expel air from the lungs; also called thoracic diaphragm.
A permeable or semipermeable membrane.
To reduce lens aperture using an optical diaphragm.
To act as a diaphragm, for example by vibrating.
A loop-shaped intrauterine device.
A complete circuit for an electric current.
A quasigroup with an identity element.
A ring road or beltway.
The opening so formed.
A small, narrow opening; a loophole.
A flexible region in a protein's secondary structure.
A place at a terminus where trains or trams can turn round and go back the other way without having to reverse; a balloon loop, turning loop, or reversing loop.
An aerobatic maneuver in which an aircraft flies a circular path in a vertical plane.
An endless strip of tape or film allowing continuous repetition.
A length of thread, line or rope that is doubled over to make an opening.
An edge that begins and ends on the same vertex.
A shape produced by a curve that bends around and crosses itself.
A programmed sequence of instructions that is repeated until or while a particular condition is satisfied.
A path that starts and ends at the same point.
A bus or rail route, walking route, etc. that starts and ends at the same point.
To move in a loop.
To move something in a loop.
To place in a loop.
To join electrical components to complete a circuit.
To fly an aircraft in a loop.
To duplicate the route of a pipeline.
To form something into a loop.
To create an error in a computer program so that it runs in an endless loop and the computer freezes up.
To fasten or encircle something with a loop.
To form a loop.