accurate to n significant digits
rašmand bâ n raqam-e nešânâr
Fr.: écrit avec n chiffres significatifs
An expression specifying the number of meaningful digits used to express the value of a measured quantity. Same as accurate to n significant figures. For example, e = 2.71828 ... = 2.718 is rounded to four significant digits, and 2.72 to three significant digits. → accurate to n decimal places.
Fr.: signe d'addition
The → plus sign +. It is believed to be a shortened form of the letters e and t in the L. word et, which, in early German manuscripts was the term for addition. The signs + and - were first used by Johann Wiedmann in 1489.
1) To give or allocate; allot.
Nešârdan, from neš, → sign, + nuance suffix -âr.
Fr.: rendez-vous, attribution
1) An appointment for a meeting.
Verbal noun of → assign.
Fr.: mission, attribution, allocation, affectation
1) An act of assigning; appointment.
Verbal noun of → assign.
Fr.: désignation des astéroïdes
1) For an asteroid whose orbit is precisely known, a number and optionally
a proper name, e.g. (7) Iris, (24101) Cassini, (99942) Apophis.
Fr.: designation de Bayer
A stellar designation system in which a specific star is identified by a Greek letter, followed by the genitive form of its hosting → constellation's Latin name. For example, Alpha Eridani, Delta Cephei, Lambda Bootis. The Greek alphabet has only 24 letters. In case a single constellation contained a larger number of stars, Bayer amended with Latin letters: upper case A, followed by lower case b through z (omitting j and v), for a total of another 24 letters. Bayer did not go beyond z, but later astronomers added more designations using both upper and lower case Latin letters, the upper case letters following the lower case ones in general. Examples include, for Vela: a Vel (Velorum), z Vel, A Vel, Q Vel; for Scorpius: d Sco (Scorpii), A Sco; for Leo: b Leo (Leonis), o Leo, A Leo, → c Orionis. Compare with the → Flamsteed designation.
First introduced by Johann Bayer (1572-1625) in his atlas Uranometria, published in 1603 at Augsburg, Germany; → designation.
Fr.: désignation des comètes
A → nomenclature system for naming
In early 1995, a new comet designation system was established by the
→ International Astronomical Union. The main rules
are as follows:
1) barsé; 2) barsidan
Fr.: 1) dessin, plan, projet, conception; 2) dessiner, tracer le plan
1a) An outline, sketch, or plan, as of the form and structure of a work of
art, an edifice, or a machine to be executed or constructed.
M.E. designen, from M.Fr. desseign "purpose, project, design," from It. disegno, from disegnare "to mark out," from L. designare "mark out, devise, designate, appoint," from → de- "out" + signare "to mark," from signum "a mark, → sign."
Barsé, related to (Delijâni) barsi "to throw," variants baysi, vaesi,
deresi; (Xonji, Gerâši) bar-, barressa "to fall down;" ultimately
from Proto-Ir. *garH- "to throw;" cf. (+*ni-) Av. niγr- "to
throw down;" Khotanese bīr- "to throw, sow;" Pers. garzin
"a pointed arrow;"
Pashto qoer "jump, leap," aqar "fitting an arrow to the bow-string
ready to shoot;" cf. Skt. gar- "to raise a weapon;" Gk. ballein
"to throw," → problem, blema "projectile;" PIE root
*gwelH- "to throw"
(Cheung 2007). Barsé is coined on the model of Ger. Entwurf
"design; project" and entwerfen "to design,"
from werfen "to throw;" Pers. dar-andâxtan "to propound, to pose"
(Hâfez: falak râ saxt beškâfim o tarhi now dar-andâzim);
also Ar. tarh (
Fr.: dessinateur, créateur, designer
A person who devises or executes designs, especially one who creates forms, structures, and patterns, as for works of art or machines (Dictionary.com).
Fr.: signe de division
A symbol placed between two quantities (dividend and the divisor) to indicate the division of the first by the second. The division sign is written as a horizontal line with dot above and dot below, ÷ (→ obelus), or a slash or horizontal line.
Fr.: signal électromagnétique
Information transmitted by means of a modulated current or an electromagnetic wave and received by telephone, radio, television, etc.
Fr.: signe d'égalité
Same as → equals sign.
Fr.: signe égal
A mathematical symbol (=) that indicates equality of two expressions on each side of the sign. Same as → equality sign. The equals sign appears for the first time in Robert Recorde's book The Whetstone of Witte published in 1557. He was a Welsh physician and mathematician.
Fr.: designation de Flamsteed
A stellar designation system in which each star is assigned a number followed by the Latin genitive of its corresponding → constellation, such as → 61 Cygni and 82 Eridani. Compare with the → Bayer designation.
Named after John Flamsteed (1646-1719), founder of the Greenwich Observatory, and the first astronomer royal of England, who introduced this system in his catalog Historia Coelestis Britannica (1725); → designation.
grand design spiral galaxy
kahkešân-e mârpic-e farsâz
Fr.: galaxie spirale parfaite
A galaxy with prominent → arms that are clearly attached to the central → bulge or → bar spiraling continuously outward until they reach the edge of the visible disk. Some examples are: → Whirlpool galaxy (M51), M74 (NGC 628), and NGC 2997.
M.E. graunt, from O.Fr. grant, grand, from L. grandis "big, great," also "full-grown;" design, from M.E. designen, from L. designare "mark out, designate, appoint," from → de- "out" + signare "to mark," from signum→ sign; → spiral; → galaxy.
level of significance
Fr.: niveau de significativité
Same as → significance level.
Fr.: croix de multiplication
The sign used to indicate multiplication, either a times sign (×), a centered dot (·), or an asterisk. The multiplication sign was introduced by William Oughtred in 1631.