Diaphragm

Diaphragm may refer to:

Anatomy

Thoracic diaphragm, a shelf of muscle extending between the thorax and abdomen of mammals
Urogenital diaphragm, a layer of the pelvis separating deep perineal sac from the upper pelvis
Pelvic diaphragm, a pelvic muscle consisting of the Levator ani and the Coccygeus
A number of structures that act as diaphragms, including the iris and the eardrum
Any dividing structure; for example, in gasteromycetes and bryozoans, with a sense similar to that of septum

Diaphragm (optics), a stop in the light path of a lens, having an aperture that regulates the amount of light that passes
Iris diaphragm, a variable optical diaphragm
Diaphragm shutter, a type of optical shutter

Diaphragm (acoustics), a thin, semi-rigid membrane that vibrates to produce or transmit sound waves

Diaphragm (contraceptive), a small rubber dome placed in the vagina to wall off the cervix, thus preventing sperm from entering
Diaphragm (mechanical device), a sheet of a semi-flexible material anchored at its periphery
Diaphragm seal, a membrane that seals an enclosure
Diaphragm pump, a type of pump
Diaphragm arch, a type of arch
Diaphragm wall, a type of wall
Diaphragm valve, a type of valve
Diaphragm, typically the floor and/or roof in a structural system, used in Seismic retrofit projects as well as design for new construction.