An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 13176 Search : far
inequality
  ناهموگی، نابرابری   
nâhamugi, nâbarâbari

Fr.: inégalité   

1) A statement of the form a ≠ b, a > b, or a < b, asserting one quantity is greater than or less than another quantity. → equality.
2) An irregularity in the movement of a celestial object in its orbit about another which cannot be explained by their mutual gravitational attraction. Irregularities are often due to perturbation by other neighboring objects.

in-; → equality.

inert
  لَخت   
laxt (#)

Fr.: inerte   

Having no inherent power of action, motion, or resistance (opposed to active).
Chemistry: A chemically inactive element, compound or material. → inert gas.

Inert, from Fr. inerte, from L. inertem "unskilled, inactive," from → in- "without" + ars (gen. artis) "skill."

Laxt "sluggish, inert."

inert gas
  گاز ِ لَخت   
gâz-e laxt

Fr.: gaz rare, ~ inerte   

Any one of six gases helium, neon, argon, krypton, xenon, and radon, all of whose atomic shells contain complete numbers of electrons so that the atoms are almost completely chemically inactive. Same as noble gases.

inert; → gas.

inertia
  لَختی   
laxti (#)

Fr.: inertie   

Tendency of a body to preserve its state of rest or uniform motion in a straight line.

Inertia, from L. inertia "un-skillfulness, idleness," from iners (gen. inertis) "unskilled, inactive;" → inert.

Laxti "sluggishness, inertia."

inertia ellipsoid
  بیضی‌وار ِ لختی   
beyzivâr-e laxti

Fr.: ellipsoïde d'inertie   

An ellipsoid used in describing the motion of a rotating rigid body. It is stationary with respect to the rotating body, and is determined by the body's moments of inertia.

ellipsoid; → inertia.

inertial
  لختی‌ناک، لختی‌مند   
laxtinâk, laxtimand

Fr.: inertiel, d'inertie   

Of or relating to inertia.

From → inertia + → -al.

Laxt, adj. of laxti, → inertia

inertial force
  نیروی ِ لختی‌ناک، ~ لختی‌مند   
niru-ye laxtinâk, ~ laxtimand

Fr.: force inertielle   

A force arising from the → acceleration of an observer's → frame of reference.

inertial; → force.

inertial frame
  چارچوب ِ لختی‌ناک، ~ لختی‌مند   
cârcub-e laxtinâk, ~ laxtimand

Fr.: référentiel galiléen   

inertial reference frame.

inertial; → frame.

inertial mass
  جرم ِ لختی‌ناک، ~ لختی‌مند   
jerm-e laxtinâk, ~ laxtimand

Fr.: masse inertielle   

The mass of a body as determined from the acceleration of the body when it is subjected to a force that is not due to gravity.

inertial; → mass.

inertial motion
  جنبش ِ لختی‌ناک، ~ لختی‌مند   
jonbeš-e laxtinâk, ~ laxtimand

Fr.: mouvement inertiel   

Motion free of any force, with constant velocity.

inertial; → motion.

inertial oscillation
  نوش ِ لختی‌ناک، ~ لختی‌مند   
naveš-e laxtinâk, ~ laxtimand

Fr.: oscillation inertielle   

1) A periodic motion of a particle that moves, free from external forces, over the surface of a rotating sphere, such the Earth. Inertial oscillations result from the → Coriolis force. For example, a hockey puck launched on a big enough lake in the northern hemisphere would turn to the right (east) and eventually loop back to nearly the initial point (actually west of that point). The time it takes for the huckey puck to return can be computed with the → Coriolis frequency.
2) Meteo.: An anticyclonic (clockwise) rotation in the northern hemisphere, with the Coriolis force providing the → centripetal acceleration with period of 2π/f, where f is the Coriolis frequency. The opposite should occur in the southern hemisphere.

inertial; → oscillation.

inertial reference frame
  چارچوب ِ بازبرد ِ لختی‌ناک، ~ ~ لختی‌مند   
cârcub-e bâzbord-e laxtinâk, ~ ~ laxtimand

Fr.: référentiel galiléen   

A → reference frame or coordinate system in which there are no accelerations, only zero or uniform motion in a straight line. According to the special theory of relativity, it is impossible to distinguish between such frames by means of any internal measurement.

inertial; → reference; → frame.

infall
  درون‌اُفت   
darun-oft

Fr.: chute vers le centre   

The fall of matter toward the center of a region of gravitational influence.

Infall, from → in- + → fall.

Darun-oft, from darun- "in, into; within" (Mid.Pers. andarôn "inside," from andar, → inter-, + rôn "side, direction;" Av. ravan- "(course of a) river") + oft, → fall.

infect
  فژیدن   
fažidan

Fr.: infecter   

To affect, cause infection, or contaminate with a pathogenic microorganism or agent.

M.E. infecten, from L. infectus, p.p. of inficere "to immerse in dye, discolor, taint, poison," from equivalent to → in- + → -fac, combining form of facere "to do, make," → fact, + -tus p.p. suffix; from PIE root *dhe- "to set, put."

Fažidan, infinitive from faž "dirt, filth, pus;" related word faže, fažnâk, fažgen, fažegen, fažgin, fažqand "filthy, dirty;" of unknown origin. It may be related to Proto-Ir. root *xard- "to defecate," with offshoots xard "muddy place," xarra "mud," (+ *pati-) payxâl "excrement."

infectant
  فژنده   
fažande

Fr.: infectant   

1) A thing that infects or causes infection.
2) Causing infection; infecting.

infect; → -ant.

infected
  فژیده   
fažide

Fr.: infecté   

1) Affected with a disease-causing organism.
2) Computers: Affected with a → virus.

P. p. of → infect.

infectiology
  فژه-شناسی   
fažešenâsi

Fr.: infectiologie   

A branch of medicine that deals with the diagnosis, management and treatment of various infectious or contagious diseases.

infection; → -logy.

infection
  فژه، فژش   
faže, fažeš

Fr.: infection   

1) An act or fact of infecting; state of being infected.
2) An infecting agency or influence.
3) An infectious disease.
4) Computers: The presence of a virus in, or its introduction into, a computer system.

Verbal noun of → infect.

infectious
  فژناک   
fažnâk

Fr.: infectieux   

1) Capable of causing infection.
2) Caused by or capable of being transmitted by infection.

infect(ion) + -ious, variant of → -ous.

infective
  فژشی، فژشگر، فژنده   
faži, fažgar, fažande

Fr.: infectieux   

Capable of causing infection.

infect; → -ive.


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