different between aperture vs cavity
aperture
English
Etymology
Borrowed from Latin apert?ra (“opening”), from apertus, past participle of aper?re (“to open, uncover”), opposed to oper?re (“to close, cover”). See aperient. Doublet of overture.
Pronunciation
- (Received Pronunciation) IPA(key): /?æp.?.t??(?)/, /?æp.?.tj??(?)/
- (US) IPA(key): /?æp.?.t??/
- Hyphenation: ap?er?ture
Noun
aperture (plural apertures)
- A small or narrow opening, gap, slit, or hole.
- 1860, Samuel Hannaford, Sea and River-side Rambles in Victoria Chapter 7
- In the centre of the fleshy membrane is an aperture leading into a deep cavity, at the bottom of which is placed a prominent piston that may be retracted by muscular fibres provided for the purpose.
- 1860, Samuel Hannaford, Sea and River-side Rambles in Victoria Chapter 7
- (optics) Something which restricts the diameter of the light path through one plane in an optical system.
- (astronomy, photography) The diameter of the aperture (in the sense above) which restricts the width of the light path through the whole system. For a telescope, this is the diameter of the objective lens.
- (spaceflight, communication) The (typically) large-diameter antenna used for receiving and transmitting radio frequency energy containing the data used in communication satellites, especially in the geostationary belt. For a comsat, this is typically a large reflective dish antenna; sometimes called an array.
- (mathematics, rare, of a right circular cone) The maximum angle between the two generatrices.
- If the generatrix makes an angle ? to the axis, then the aperture is 2?.
Usage notes
The aperture of microscopes is often expressed in degrees, called also the angular aperture, which signifies the angular breadth of the pencil of light which the instrument transmits from the object or point viewed; as, a microscope of 100° aperture.
Derived terms
Related terms
Translations
Further reading
- aperture in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.
- aperture in The Century Dictionary, New York, N.Y.: The Century Co., 1911.
French
Etymology
Borrowed from Latin apert?ra (“opening”). Doublet of ouverture.
Pronunciation
- IPA(key): /a.p??.ty?/
Noun
aperture f (uncountable)
- (phonetics, phonology) opening, openness, aperture
Related terms
- apéritif
- ouvrir
Further reading
- “aperture” in Trésor de la langue française informatisé (The Digitized Treasury of the French Language).
Italian
Pronunciation
- Rhymes: -ure
Noun
aperture f
- plural of apertura
Anagrams
- reputare
- reputerà
Latin
Participle
apert?re
- vocative masculine singular of apert?rus
Spanish
Verb
aperture
- First-person singular (yo) present subjunctive form of aperturar.
- Formal second-person singular (usted) present subjunctive form of aperturar.
- Third-person singular (él, ella, also used with usted?) present subjunctive form of aperturar.
- Formal second-person singular (usted) imperative form of aperturar.
aperture From the web:
- what aperture to use
- what aperture lets in more light
- what aperture to use for landscape
- what aperture blurs the background
- what aperture lets in the least light
- what aperture for portraits
- what aperture to use for family portraits
- what aperture for family portraits
cavity
English
Etymology
From Middle English cavity, from Middle French cavité, from Late Latin cavitas, from Latin cavus (“hollow”).
Pronunciation
- IPA(key): /?kæv?ti/
- (US) IPA(key): [?k?æv??i]
Noun
cavity (plural cavities)
- A hole or hollow depression.
- A hollow area within the body (such as the sinuses).
- (dentistry) A small or large hole in a tooth caused by caries; often also a soft area adjacent to the hole also affected by caries.
Synonyms
- See also Thesaurus:hole
- (dentistry): caries
Derived terms
Related terms
- cave
- concave
- excavate
- excavation
- excavator
Translations
Further reading
- cavity in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.
- cavity in The Century Dictionary, New York, N.Y.: The Century Co., 1911.
- cavity at OneLook Dictionary Search
cavity From the web:
- what cavity is the heart in
- what cavity is the liver in
- what cavity is the lungs in
- what cavity is the stomach in
- what cavity is the spleen in
- what cavity is the brain in
- what cavity is the urinary bladder in
- what cavity contains the heart and lungs
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