# An Etymological Dictionary of Astronomy and AstrophysicsEnglish-French-Persian

## فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

### M. Heydari-Malayeri    -    Paris Observatory

Homepage

<< < ana SI > >>

Number of Results: 33 Search : unit
 SI units   یکاهای ِ SI   yekâhâ-ye SIFr.: Système International   A coherent and rationalized system of units, in common use in physics since 1969. The seven basic units are the → meter, the → kilogram, the → second, the → ampere, the → kelvin, the → mole, and the → candela. Same as international system of units.SI, from Fr. Système Internationale d'unités; → unit. solar neutrino unit (SNU)   یکای ِ نوترینوهای ِ خورشیدی   yekâ-ye notrinohâ-ye xoršidiFr.: unité de neutrinos solaires   A measure of the flux of neutrinos from the Sun reaching the Earth. 1 SNU is equal to 10-36 solar neutrinos captured per target atom per second.→ solar; → neutrino; → unit. unit   یکا، یکان   yekâ (#), yekân (#)Fr.: unité   A quantity or dimension adopted as a standard of measurement. Math.: The lowest positive natural number. The first digit to the left of the decimal point in decimal notation, representing a whole number less than ten. An element in a ring that has a multiplicative inverse.Back formation from → unity.Yekâ, yekân, from yek, → one. unit vector   بردار ِ یکا   bordâr-e yekâFr.: vecteur unité   A vector of length 1, also called a direction vector.→ unit; → vector. unitarity   یکاییگی   yekâyigiFr.: unitarité   1) The condition of being → unitary. 2) → quantum unitarity.→ unitary; → -ity. unitary   یکایی   yekâyiFr.: unitaire   1) Of or pertaining to a unit or units; having the indivisible character of a unit. 2) Math.: An → operator  U satisfying the relations: U+ U = 1, U U+ = 1, where U+ is the → adjoint .→ unit + -ary. unitary group   گروه ِ یکایی، ~ یکانی   goruh-e yekâyi, ~ yekâniFr.: groupe unitaire   The set of n × n unitary matrices (→ unitary matrix).→ unitary; → group. unitary matrix   ماتریس ِ یکایی، ~ یکانی   mâtris-e yekâyi, ~ yekâniFr.: matrice unitaire   A square matrix whose inverse equals its adjoint.→ unitary; → matrix. unitary operator   آپارگر ِ یکایی   âpârgar-e yekâyiFr.: opérateur unitaire   A linear operator whose inverse is its → adjoint. In addition to → Hermitian operators, unitary operators constitute a fundamentally important class of quantum-mechanical operators.→ unitary; → operator. unitary transformation   ترادیس ِ یکایی، ~ یکانی   tarâdis-e yekâyi, ~ yekâniFr.: transformation unitaire   A transformation whose reciprocal is equal to its Hermitian conjugate. unite   آیکیدن، هم‌یکیدن   âyekidan, ham-yekidanFr.: unir   To join, combine, or incorporate so as to form a single whole or unit.M.E. uniten, from L. unitus, p.p. of unire "to unite," from unus, → one.Âyekidan, from â- nuance/strengthening prefix + yek, → one, + -idan infinitive suffix; ham-yekidan, from ham- "together," → syn-, + yekidan. united   آیکیده، هم‌یکیده   âyekidé, ham-yekidéFr.: uni   Formed by or resulting from the union of two or more persons or things.P.p. of → unite. unity   یکی   yeki (#)Fr.: unité   The state or condition of being one. Math.: One.M.E. unite, from O.Fr., from L. unitatem "oneness, sameness, agreement," from unus, → one.Yeki, noun from yek, → one.

<< < ana SI > >>