- The definition of a diaphragm is any thin material that creates a partition.
- The thick muscular partition that separates your thorax from your abdomen is an example of a diaphragm.
- A barrier that fits over the cervix and prevents pregnancy is an example of a diaphragm.
- A part of a camera that controls the size of the lens' aperture is an example of a diaphragm.
- the partition of muscles and tendons between the chest cavity and the abdominal cavity; midriff
- any membrane or partition that separates one thing from another
- a dividing wall at the node of a plant stem
- a device to regulate the amount of light entering the lens of a camera, microscope, etc.
- ☆ a small, flexible contraceptive device of rubber or plastic that fits over the cervix of the uterus
- a thin, flexible disk or cone that vibrates in response to sound waves to produce electrical signals, as in a microphone, or that vibrates in response to electrical signals to produce sound waves, as in a speaker
Origin of diaphragmMiddle English diafragma ; from Late Latin diaphragma ; from Classical Greek ; from dia-, through + phragma, a fence ; from phrassein, to enclose
- Anatomy A muscular membranous partition separating the abdominal and thoracic cavities and functioning in respiration. Also called midriff.
- A membranous part that divides or separates.
- A thin disk, especially in a microphone or telephone receiver, that vibrates in response to sound waves to produce electric signals, or that vibrates in response to electric signals to produce sound waves.
- A contraceptive device consisting of a thin flexible disk, usually made of rubber, that is designed to cover the uterine cervix to prevent the entry of sperm during sexual intercourse.
- A disk having a fixed or variable opening used to restrict the amount of light traversing a lens or optical system.
Origin of diaphragmMiddle English diafragma, from Late Latin diaphragma, midriff, from Greek, partition, from diaphrassein, to barricade : dia-, intensive pref.; see dia– + phrassein, phrag-, to enclose.
- (anatomy) 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.
- (anatomy) Any of various membranes or sheets of muscle or ligament which separate one cavity from another.
- A contraceptive device consisting of a flexible cup, used to cover the cervix during intercourse.
- (mechanics) A flexible membrane separating two chambers and fixed around its periphery that distends into one or other chamber depending on the as the difference in the pressure in the chambers varies.
- (acoustics) In a speaker, the thin, semi-rigid membrane which vibrates to produce sound.
- (optics, photography) A thin opaque structure with a central aperture, used to limit the passage of light into a camera or similar device.
- (chemistry) A permeable or semipermeable membrane
- (construction) A floor slab, metal wall panel, roof panel or the like, havig a sufficiently large in-plane shear stiffness and sufficient strength to transmit horizontal forces to resisting systems.
(third-person singular simple present diaphragms, present participle diaphragming, simple past and past participle diaphragmed)
From Ancient Greek διάφραγμα (diáphragma, “partition”), from διά (dia, “across”) and φράγμα (phragma, “barrier”), from the verb φράσσω (phrasso)..