different between spiral vs aperture

English

Etymology

From Middle French spirale, from Medieval Latin spiralis, from Latin spira, from Ancient Greek ?????? (speíra, “wreath, coil, twist”).

Pronunciation

• IPA^(key): /?spa???l/
• Rhymes: -a???l

Noun

spiral (plural spirals)

1. (geometry) A curve that is the locus of a point that rotates about a fixed point while continuously increasing its distance from that point.
2. (informal) A helix.
3. A self-sustaining process with a lot of momentum involved, so it is difficult to accelerate or stop it at once.

Derived terms

Translations

Adjective

spiral (not comparable)

1. Helical, like a spiral

Translations

Verb

spiral (third-person singular simple present spirals, present participle (US) spiraling or (UK) spiralling, simple past and past participle (US) spiraled or (UK) spiralled)

1. (intransitive) To move along the path of a spiral or helix.

   The falling leaves spiralled down from the tree.

2. (transitive) To cause something to spiral.

   You need to learn how to spiral a ball.

3. (figuratively, intransitive) To increase continually.

   Her debts were spiralling out of control.

Translations

Further reading

• spiral on Wikimedia Commons.Wikimedia Commons

Anagrams

• Aprils, Plairs, prials

Danish

Pronunciation

Noun

spiral c (singular definite spiralen, plural indefinite spiraler)

1. spiral

Declension

Further reading

• “spiral” in Den Danske Ordbog
• “spiral” in Ordbog over det danske Sprog

French

Pronunciation

• IPA^(key): /spi.?al/

Adjective

spiral (feminine singular spirale, masculine plural spiraux, feminine plural spirales)

1. spiral

Noun

spiral m (plural spiraux)

1. spiral

Further reading

• “spiral” in Trésor de la langue française informatisé (The Digitized Treasury of the French Language).

Northern Sami

Pronunciation

Etymology

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

Noun

spiral

1. hip

Inflection

This noun needs an inflection-table template.

Further reading

• Koponen, Eino; Ruppel, Klaas; Aapala, Kirsti, editors (2002-2008) Álgu database: Etymological database of the Saami languages?^[1], Helsinki: Research Institute for the Languages of Finland

Norwegian Bokmål

Etymology

From Medieval Latin spiralis, from Latin spira

Noun

spiral m (definite singular spiralen, indefinite plural spiraler, definite plural spiralene)

1. a spiral, coil
2. a coil (contraceptive device)

Derived terms

• spiralfjær
• spiraltrapp

References

• “spiral” in The Bokmål Dictionary.

Norwegian Nynorsk

Etymology

From Medieval Latin spiralis, from Latin spira

Noun

spiral m (definite singular spiralen, indefinite plural spiralar, definite plural spiralane)

1. a spiral, coil
2. a coil (contraceptive device)

Derived terms

• spiraltrapp

References

• “spiral” in The Nynorsk Dictionary.

Romanian

Etymology

From French spiral

Adjective

spiral m or n (feminine singular spiral?, masculine plural spirali, feminine and neuter plural spirale)

1. spiral

Declension

Further reading

• spiral in DEX online - Dic?ionare ale limbii române (Dictionaries of the Romanian language)

Swedish

Pronunciation

Noun

spiral c

1. spiral

Declension

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)

1. 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.
2. (optics) Something which restricts the diameter of the light path through one plane in an optical system.
3. (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.

4. (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.
5. (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)

1. (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

1. plural of apertura

Anagrams

• reputare
• reputerà

Latin

Participle

apert?re

1. vocative masculine singular of apert?rus

Spanish

Verb

aperture

1. First-person singular (yo) present subjunctive form of aperturar.
2. Formal second-person singular (usted) present subjunctive form of aperturar.
3. Third-person singular (él, ella, also used with usted^?) present subjunctive form of aperturar.
4. Formal second-person singular (usted) imperative form of aperturar.