Diaphragm vs Null - What's the difference?
diaphragm | null |
(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 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
* {{quote-book, 1921, Wilder Dwight Bancroft, Applied Colloid Chemistry: General Theory
, passage=The mass of liquid transported through a porous diaphragm in a given time is directly proportional to the current. }}
(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.
Image:Diaphragm.jpg, The thoracic diaphragm .
Image:Contraception diaphragme.jpg, A contraceptive diaphragm .
Image:Seal (diaphragm).png, A mechanical diaphragm .
Image:X5 Paper Pulp Cone.jpg, An acoustic diaphragm .
(optics, photography) To reduce lens aperture using an optical diaphragm.
* {{quote-book, 1870, D. Appleton & Co., Appletons' Annual Cyclopædia and Register of Important Events of the Year 1869
, passage=He employs an equatorial with an object-glass having a focal length of five metres, and which was diaphragmed down to eight centimetres.}}
To act as a diaphragm, for example by vibrating.
* {{quote-book, 1996, Tom Drozda et al., Tool and Manufacturing Engineers Handbook, vol. VIII: Plastic Part Manufacturing
, passage=The holes and burning are caused by the part diaphragming at 20000-40000 cycles/second.}}
A non-existent or empty value or set of values.
Zero]] quantity of [[expression, expressions; nothing.
Something that has no force or meaning.
(computing) the ASCII or Unicode character (), represented by a zero value, that indicates no character and is sometimes used as a string terminator.
(computing) the attribute of an entity that has no valid value.
One of the beads in nulled work.
(statistics) null hypothesis
Having no validity, "null and void"
insignificant
* 1924 , Marcel Proust, Within a Budding Grove :
absent or non-existent
(mathematics) of the null set
(mathematics) of or comprising a value of precisely zero
(genetics, of a mutation) causing a complete loss of gene function, amorphic.
As nouns the difference between diaphragm and null
is that diaphragm is (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 while null is zero, nil; the cardinal number before einn.As a verb diaphragm
is (optics|photography) to reduce lens aperture using an optical diaphragm.diaphragm
English
Noun
(en noun)citation
Derived terms
(Derived terms) * diaphragmal * diaphragmic * diaphragmatic * diaphragmatically * interdiaphragm * diaphragm arch * diaphragm pump * diaphragm seal * diaphragm shutter * diaphragm valve * iris diaphragmVerb
(en verb)citation
citation
null
English
Noun
(en noun)- (Francis Bacon)
- Since no date of birth was entered for the patient, his age is null .
Adjective
(en adjective)- In proportion as we descend the social scale our snobbishness fastens on to mere nothings which are perhaps no more null than the distinctions observed by the aristocracy, but, being more obscure, more peculiar to the individual, take us more by surprise.