Fr.: système multi-planète
A stellar system with more than one orbiting planet.
Consisting of, having, or involving several or many individuals, parts, elements, etc.
From Fr. multiple, from L.L. multiplus "manifold," from L. → multi- "many, much" + -plus "fold," from base of plicare "to fold, twist."
Bastâ-, from bas "many, much" (Mid.Pers. vas "many, much;" O.Pers. vasiy "at will, greatly, utterly;" Av. varəmi "I wish," vasô, vasə "at one's pleasure or will," from vas- "to will, desire, wish") + tâ "fold, plait, ply; piece, part," also a multiplicative suffix; Mid.Pers. tâg "piece, part."
Fr.: poses multiples
The division of a relatively long exposure into several successive shorter ones, e.g. to avoid detector saturation.
Fr.: intégrale multiple
A series of successive integrations in which the integral operator acts on the result of preceding integration.
Fr.: diffusion multiple
A process of → radiative transfer in which more than one → scattering event may be of importance before → transmission, → reflection, or → absorption. In → radiation-driven winds photon scattering can take place in different → spectral lines. Each scattering occurs in a different spectral line, and successive scatterings occur at lower energies (longer wavelength). The standard theory of line driving (→ CAK model) assumes that photons can be scattered only once in the wind, which is a reasonable assumption for normal → O stars. In → Wolf-Rayet stars, where photons evolve in an atmosphere with a strong → ionization stratification, multiple scattering is important. Indeed the strength of W-R winds appears to exceed the single scattering limit.
Fr.: étoile multiple
multiple star system
Fr.: système multiple
A stellar system composed of several stars bound together by gravitational attraction and revolving around a common center of mass.
A group of spectral lines arising from transitions having a common lower energy level.
From → multi- + -plet on the model of triplet.
Bastâyé, from bastâ-→ multi- + euphonic -yé, from -é nuance suffix.
A number to be multiplied by another.
From L. multiplicandum, from multiplicandus "to be multiplied," gerundive of multiplicare, → multiply.
Bastâšow, literally "that undergoes multiplication," from bastâ, → multiple, + šow, present stem and agent noun of šodan "to become, to be, to be doing, to go, to pass," from Mid.Pers. šudan, šaw- "to go;" Av. šiyav-, š(ii)auu- "to move, go," šiyavati "goes," šyaoθna- "activity; action; doing, working;" O.Pers. šiyav- "to go forth, set," ašiyavam "I set forth;" cf. Skt. cyu- "to move to and fro, shake about; to stir," cyávate "stirs himself, goes;" Gk. kinein "to move;" Goth. haitan "call, be called;" O.E. hatan "command, call;" PIE base *kei- "to move to and fro."
In general, the process of repeatedly adding a quantity to itself a certain number of times, or any other process which has the same result.
Verbal noun of → multiply.
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.
Involving → multiplication.
Fr.: identité multiplicative
The number which when used as the multiplier of another number leaves the second unchanged; one.
Fr.: inverse multiplicative
The number which when used as a multiplier of another number (except 0) produces 1. For example (1/5) x 5 = 1; each of the numbers is the multiplicative inverse of the other.
1) The state of being multiple, made of several components.
Arithmetic: A number by which another is multiplied. Physics: A device for intensifying some effect.
Agent noun of → multiply.
To make many or manifold; increase the number, quantity, etc., of.
O.Fr. multiplier, from L. multiplicare "to increase," from multiplex (gen. multiplicis) "having many folds, many times as great in number," from multi- "many" + base of plicare "to lay, fold, twist."
Bastâyidan, from bastâ, → multiple, + -idan infinitive suffix.
An entity consisting of several poles.
Fr.: indice multipolaire
A variable used in → spherical harmonic expansions. Each spherical harmonic is characterized by its multipole index l: l = 0 for a → monopole, l = 1 for a → dipole, and so on. It is used in particular to describe the → cosmic microwave background anisotropy: ΔT/T0 (θ,φ) = Σ almYlm(θ,φ), where θ and φ are the → spherical polar coordinates, Ylm is the → spherical harmonic functions, and the sum runs over l = 1, 2, ..., ∞ and m = -l, ..., l, where the multipole index l corresponds to angular scales ≅ 180°/l.
Fr.: moment multipolaire
The quantity that gives the electric potential field due to a distribution of charges, such as a → dipole, → quadrupole, → octupole, etc. A multipole moment usually involves powers of the distance to the origin, as well as some angular dependence.