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

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

   Homepage   
   


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Number of Results: 6 Search : ideal
ideal
  ۱) آرمان، مینه‌وار؛ ۲) آرمانی، مینه‌ای، مینه‌وار   
1) (n.) ârmân (#), minevâr; 2) (adj.) ârmâni (#), mineyi, minevâr

Fr.: idéal   

1) (n.) A standard of perfection, beauty, or excellence.
Math.: A subset of a ring that is closed under addition and multiplication by any element of the ring.
2) (adj.) Existing only in the imagination; not real or actual.
Conforming exactly to an ideal, law, or standard; perfect. → ideal gas.

M.E. ydeall, from L.L. idealis "existing in idea," from L. → idea.

Ârmân "ideal" in Mod.Pers., traditionally "desire; hope; grief," variants armân, urmân, prefixed from mân, "thought, mind," → idea. The first element may be related to Av. armaē- "in peace, still; quietly;" PIE base *er[ə]- "to be still" (cf. Skt. īrmā (adv.) "quiet, still, being in the same place;" Gk. erôé "calm, peace;" O.H.G. rouwa "rest"), as in Av. armaē.šad- "sitting quietly," armaē.štā- "standing still, stagnant." Therefore, Pers. ârmân may be related to Av. *armaē.manah- (PIE *ermen-) "thought in peace, quiet mind."
Mineyi, minevâr, adj. from miné, → idea.

ideal fluid
  شاره‌ی ِ آرمانی، ~ مینه‌وار   
šâre-ye ârmâni, ~ minevâr

Fr.: fluide idéal   

An fluid which has no internal friction or → viscosity, and no → resistivity as well if the fluid is a plasma.

ideal; → fluid.

ideal gas
  گاز ِ آرمانی، ~ ِ مینه‌وار   
gâz-e ârmâni, ~-e minevâr

Fr.: gaz idéal   

Theoretical gas assumed to consist of perfectly elastic molecules of negligible volume and mutual attraction force. Also called → perfect gas.

ideal; → gas.

ideal gas law
  قانون ِ گاز ِ آرمانی، ~ ~ مینه‌وار   
qânun-e gâz-e ârmâni, ~ ~ minevâr

Fr.: loi des gaz parfaits   

An → equation of state that relates pressure (P), temperature (T), and volume (V) of an ideal or → perfect gas: PV = nRT, where n is the number of → moles of gas present and R is the → universal gas constant. Equivalently: PV = NkT, where N is the number of atoms of gas present and k is → Boltzmann's constant.

ideal; → gas; → law.

ideal MHD condition
  بوتار ِ MHDی ِ آرمانی   
butâr-e MHD-ye ârmâni

Fr.: MHD idéale   

Magnetohydrodynamics of a plasma with very large (infinite) conductivity. In this limit, Ohm's law reduces to E = -v x B, where E represents electric field, B magnetic field, and v the fluid velocity.

ideal; → magnetohydrodynamics (MHD); → condition.

idealism
  مینه‌باوری   
minebâvari

Fr.: idéalisme   

Any one of a variety of systems of philosophical thought, which would make the ultimate reality of the Universe expressible or intangible only in terms of idea in mind, rather than in terms of matter in space.

From → ideal, see also → idea, + → -ism.