An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 1223
common denominator
  نامان ِ همدار   
nâmân-e hamdâr

Fr.: dénominateur commun   

A quantity into which all the denominators of a set of fractions may be divided without a remainder.

common; → denominator.

common fraction
  برخه‌ی ِ همدار   
barxe-ye hamdâr

Fr.: fraction d'entiers   

A fraction written as a/b where a and b are → positive  → integers, as opposed to a → decimal fraction; for example, 5/7. Common fractions are sometimes also called → vulgar fractions.

common; → fraction.

common logarithm
  لگاریتم ِ دهدهی   
logâritm-e dahdahi

Fr.: logarithme décimal   

The logarithm with → base 10. It is known also as the → decimal logarithm, decadic logarithm, or Briggsian logarithm, after Henry Briggs, an English mathematician who pioneered its use.

common; → logarithm; → decimal.

commonalty
  پاترم   
pâtram (#)

Fr.: peuple, foule   

The ordinary people, as distinguished from those with authority, rank, station, etc.; the common people. Also, commonality (Dictionary.com).

M.E., from M.Fr. comunalte, from comunal- "communal," → common, + -te "-ty," a suffix denoting state, quality, etc.

Mid.Pers. pâtram "common people, commonalty" (MacKenzie), variant pâyram, prefixed from ram "herd, flock," Mod.Pers. ramé "herd, flock."

commonness
  همداری   
hamdâri

Fr.: caractère commun, banalité   

The fact or state of being → common or happening often.

common; → -ness.

commune
  همداره   
hamdâré

Fr.: commune   

1) A small group of persons living together, sharing possessions, work, income, etc., and often pursuing unconventional lifestyles.
2) Any community organized for the protection and promotion of local interests, and subordinate to the state (Dictionary.com).

From M.Fr. commune "free city, group of citizens," from M.L. communia, noun use of neuter plural of L. adj. communis, literally "that which is common," from communis, → common.

Hamdâré, from hamdâr, → common.

communicate
  همدارگندن   
hamdârgandan

Fr.: communiquer   

1a) To impart knowledge of; make known.
1b) To give to another; impart; transmit (as a disease).
2a) To give or interchange thoughts, feelings, information, or the like, by writing, speaking, etc.
2b) To express thoughts, feelings, or information easily or effectively (Dictionary.com).

From L. communicatus, p.p. of communicare "to share, divide out; impart; inform; join, participate in," literally "to make common," from communis, → common.

Hamdârgandan, literally "to diffuse to the public," from hamdâr, → common, + gan, variant kan "to throw, diffuse" (as in parâgan-, parâgandan "to diffuse, disperse, scatter;" afgandan "to throw; to lay, place;" kandan "to dig; to extract"), from Proto-Ir. *kan- "to throw, place, put, disperse, → scatter" + -dan infinitive suffix.

communication
  همدارگنش   
hamdârganeš

Fr.: communication   

1) The act or process of communicating; fact of being communicated.
2) The imparting or interchange of thoughts, opinions, or information by speech, writing, or signs (Dictionary.com).

Verbal noun of → communicate.

communism
  همدارباوری، همدارگرایی   
hamdârbâvari, hamdâgerâyi

Fr.: communisme   

A theory or system of social organization based on the holding of all property in common, actual ownership being ascribed to the community as a whole or to the state (Dictionary.com).

commune; → -ism.

communitarian
  همدارگان‌گرا، همدارگان‌باور   
hamdârgângerâ, hamdârgânbâvar

Fr.: communautaire-   

A member of a communistic community; an advocate of such a community.

community; → -ary; → -an.

communitarianism
  همدارگان‌گرایی، همدارگان‌باوری   
hamdârgângerâyi, hamdârgânbâvari

Fr.: communautarisme   

A doctrine or system of social organization that upholds the importance of communities. It tends to lessen the focus on individual rights and increase the focus on communal responsibilities.

communitarian; → -ism.

communitary
  همدارگانی   
hamdârgâni

Fr.: communautaire-   

Of or relating to a community; communal.

community; → -ary.

community
  ۱) همدارگان؛ ۲) همداری   
1) hamdârgân; 2) hamdâri

Fr.: communauté   

1a) A social group whose members share common characteristics or interests, such as values, identity, and often a common location (e.g. a village, town, or neighborhood).
1b) Ecology: A group of populations of different species (plants and animals) within a specified location in space and time. 2) Common ownership or participation; joint possession.

Ultimately from L. communitas "partnership, society, fellowship," from communis, → common "common, public, general," + -itas, → -ity

Hamdârgân, from hamdâr, → common, + -gân suffix forming plural entities, from Mid.Pers. -gânag, -gâna, on the model of hamegân, → public.

commutation
  هم‌موتش   
hammuteš

Fr.: commutation   

General: A substitution, exchange, or interchange.
Electronics: The transfer of current from one channel to another in a gas tube.
Electricity: The reversal of direct current into alternating current.
Math: A commutative operation, where a . b = b . a.

Noun from → commute.

commutation rules
  رزن‌های ِ هم‌موتش   
razanhâ-ye hammuteš

Fr.: règles de commutation   

The specification of commutators of operators that in quantum physics correspond to the coordinates and momenta of a system.

commutation; → rule.

commutative
  هم‌موتنده   
hammutandé

Fr.: commutatif   

(adj.) Of or pertaining to → commutation.

Adj. from → commute.

commutative law
  قانون ِ هم‌موتشی   
qânun-e hammuteši

Fr.: loi commutative   

A principle holding for the operations of addition and multiplication (in some number domains) that asserts that the consequence of the given operation is not affected by the order in which the terms are considered. Thus x + y = y + x; x . y = y . x.

commutative; → law. The first use of the word commutative in this sense is ascribed to the French mathematician François Joseph Servois (1768-1847).

commutativity
  هم‌موتندگی   
hammutandegi

Fr.: commutativité   

The state or quality of being commutative.

Noun from → commutative.

commutator
  هم‌موتگر   
hammutgar

Fr.: commutateur   

Math.: The commutator of a and b is the element c of a group such that bac = ab.

Agent noun from → commute.

commute
  هم‌موتیدن   
hammutidan

Fr.: échanger   

To substitute (one thing for another); exchange. → mutation.
Math., logic: To satisfy or engage in a commutative operation.

From L. commutare "to change altogether," from → com- + mutare "to change," from PIE base *mei- "to change, go, move;" cf. Av. miθô "inverted, false," miθaoxta- "wrong spoken;" Skt. methati "changes, alternates, joins, meets," mithah "mutual, reciprocal;" L. meare "to go, pass," mutuus "done in exchange;" Goth. maidjan "to change;" E. prefix mis- (in mistake).

Hammutidan, from ham-com- + mut, from L. mutare cognate with Av. miθô, as above, + -idan infinitive suffix.

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