different between aperture vs difference

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.

English

Etymology

From Middle English difference, from Old French difference, from Latin differentia (“difference”), from differ?ns (“different”), present participle of differre. Doublet of differentia.

Morphologically differ +? -ence.

Pronunciation

• IPA^(key): /?d?f??n(t)s/
• (rare) IPA^(key): /?d?f???n(t)s/
• Hyphenation: diffe?rence, dif?fer?ence

Noun

difference (countable and uncountable, plural differences)

1. (uncountable) The quality of being different.

   Antonyms: identity, sameness

2. (countable) A characteristic of something that makes it different from something else.

3. (countable) A disagreement or argument.

   We have our little differences, but we are firm friends.

   • 1714, Thomas Ellwood, The History of the Life of Thomas Ellwood: written by his own hand

     Away therefore went I with the constable, leaving the old warden and the young constable to compose their difference as they could.

4. (countable, uncountable) Significant change in or effect on a situation or state.
   • 1908, Kenneth Grahame, The Wind in the Willows

     The line of the horizon was clear and hard against the sky, and in one particular quarter it showed black against a silvery climbing phosphorescence that grew and grew. At last, over the rim of the waiting earth the moon lifted with slow majesty till it swung clear of the horizon and rode off, free of moorings; and once more they began to see surfaces—meadows wide-spread, and quiet gardens, and the river itself from bank to bank, all softly disclosed, all washed clean of mystery and terror, all radiant again as by day, but with a difference that was tremendous.

6. (countable) The result of a subtraction; sometimes the absolute value of this result.

   The difference between 3 and 21 is 18.

7. (obsolete) Choice; preference.
8. (heraldry) An addition to a coat of arms to distinguish two people's bearings which would otherwise be the same. See augmentation and cadency.
9. (logic) The quality or attribute which is added to those of the genus to constitute a species; a differentia.
10. (logic circuits) A Boolean operation which is TRUE when the two input variables are different but is otherwise FALSE; the XOR operation (${\displaystyle \scriptstyle A{\overline {B}}+{\overline {A}}B}$).
11. (relational algebra) the set of elements that are in one set but not another (${\displaystyle \scriptstyle A{\overline {B}}}$).

Synonyms

• (characteristic of something that makes it different from something else): departure, deviation, divergence, disparity
• (disagreement or argument about something important): conflict, difference of opinion, dispute, dissension
• (result of a subtraction): remainder
• (significant change in state): nevermind

Derived terms

Translations

See also

• addition, summation: (augend) + (addend) = (summand) + (summand) = (sum, total)
• subtraction: (minuend) ? (subtrahend) = (difference)
• multiplication: (multiplier) × (multiplicand) = (factor) × (factor) = (product)
• division: (dividend) ÷ (divisor) = (quotient), remainder left over if divisor does not divide dividend

Verb

difference (third-person singular simple present differences, present participle differencing, simple past and past participle differenced)

1. (obsolete, transitive) To distinguish or differentiate.
   • 1672 Gideon Harvey, Morbus Anglicus, Or, The Anatomy of Consumptions

     This simple spectation of the lungs is differenced from that which concomitates a pleurisy.

   (The addition of quotations indicative of this usage is being sought:)

Synonyms

• (to distinguish or differentiate): differentiate, distinguish

Translations

Related terms

Further reading

• difference in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.
• difference in The Century Dictionary, New York, N.Y.: The Century Co., 1911.

Middle English

Alternative forms

• differens, defference, defferense, dyfferens

Etymology

From Old French difference, from Latin differ?ntia; equivalent to differren (“to postpone”) +? -ence.

Pronunciation

• IPA^(key): /?dif?r?ns(?)/, /di?f?r?ns(?)/

Noun

difference (plural differences or difference)

1. Difference; the state of being different.
2. A difference; an element which separates.
3. Distinguishment; the finding or creation of dissimilarity.
4. (heraldry, rare) A heraldic cadency for a family's junior branch.
5. (mathematics, rare) The result of subtraction; an amount left over.
6. (mathematics, rare) An order in decimal representation of numbers.
7. (rare) Something that people do not agree upon.

Descendants

• English: difference
• Scots: difference

References

• “difference, n.”, in MED Online, Ann Arbor, Mich.: University of Michigan, 2007, retrieved 2019-07-31.

Old French

Alternative forms

• differance

Etymology

From Latin differentia.

Noun

difference f (oblique plural differences, nominative singular difference, nominative plural differences)

1. difference

Descendants

• ? Middle English: difference, differens, defference, defferense, dyfferens
  • English: difference
  • Scots: difference
• French: différence