1) To leave completely and finally; forsake utterly; desert.
M.E. abando(u)nen, from M.Fr. abandoner, from O.Fr. abandoner from adverbial phrase à bandon "at will, at discretion," from à "at, to," → ad-, + bandon "power, jurisdiction," from L. bannum "proclamation."
Râcidan, related to Pers. parhêz, parhiz "to keep away from, abstain, avoid," gurêz, goriz "to flee, run away;" Av. raēc- "to leave, let;" → heritage.
Fr.: bande d'absorption
1) A series of very closely spaced absorption lines in stellar spectra
resulting from the absorption of light by molecules. Bands caused by
titanium oxide (→ TiO bands) and carbon compounds occur
in the spectra of low temperature M and C stars.
→ absorption; → band.
Alexander's dark band
navâr-e siyâh-e Aleksânder
Fr.: bande noire d'Alexandre
A dark space or band between the primary and secondary rainbows when both are visible. This effect is due to the minimum refraction angle for the → primary rainbow and the maximum for the → secondary rainbow. The only light in the dark region is caused by (a small amount of) scattering, and not the refraction of light in water droplets.
Named for Alexander of Aphrodisias, Greek Peripatetic philosopher and commentator, who first described the effect in 200 AD.
Fr.: bande permise
In solid-state physics, the range of energies which electrons can attain in a material.
P.p. of v. allow, from O.Fr. alouer "approve," from L. allaudare , compound of → ad- "to" + laudare "to praise."
Bând, → band; parzâmidé, p.p. of parzâmidan "to send through, permit, allow," from parzâm "permission," from par- "through" + zâm stem of zâmidan, Mid.Pers. zâmenidan "to send, lead;" → permit
Aromatic Infrared Band (AIB)
bând-e forusorx-e aromâtik
Fr.: bande infrarouge aromatique
A family of strong infrared emission bands at 3.3, 6.2, 7.7, 8.6, 11.3, and 12.7 μm which are widely observed in a large variety of objects, such as → H II regions, → reflection nebulae, → planetary nebulae, and the → diffuse interstellar medium of our galaxy and other galaxies. Solar system objects, such as carbonaceous → meteorites and → interplanetary dust particles are also known to display these features. They are suggested to be due to → polycyclic aromatic hydrocarbons.
General:1) A strip serving to encircle
and bind one object or to hold a number of objects together.
2) A strip or stripe that contrasts with something else in color,
texture, or material.
From M.E. bende, O.E. bend, from O.Fr. bande, bende, P.Gmc. *bindan, from PIE *bendh- "to bind" (cf. Goth bandi "that which binds;" Av./O.Pers. band- "to bind, fetter," banda- "band, tie," Skt. bandh- "to bind, tie, fasten," bandhah "a tying, bandage."
Bând, adoption from E. band, which is cognate and synonymous with Pers. band, present tense stem of bastan "to bind, shut," Mid.Pers. bastan, band, Av./O.Pers. band-, as explained above. See also → strip.
bândsar, sar-e bând
Fr.: tête de bande
A location on the spectrogram of a molecule at which the lines of a band stack.
Band head, from → band + head, from O.E. heafod "top of the body," also "upper end of a slope," also "chief person, leader," from P.Gmc. *khaubuthan, from PIE *kauput- "head" (cf. Skt. kaput-, L. caput "head," Lori kapu "head," kapulek "skull, middle of the head").
Bândsar, from → bând + sar "head," soru, sorun "horn," karnâ "a trumpet-like wind instrument" (originally made from animal horns), variant sornâ "a wind instrument;" Mid.Pers. sar "head," sru "horn;" Av. sarah- "head," srū- "horn, nail;" cf. Skt. śiras- "head, chief;" Gk. kara "head," karena "head, top," keras "horn;" L. cornu "horn," cerebrum "brain;" P.Gmc. *khurnaz (E. horn; Ger. Horn, Du. horen), from PIE *ker- "head, horn."
Fr.: spectre de bande
A spectrum which consists of a number of bands each having one sharp edge. Each band is composed of a large number of closely spaced emission or absorption lines. Band spectra are typical of molecules. Bands produced by titanium oxide, zirconium oxide, and carbon compounds are characteristic of low temperature stars.
Band spectrum, from → band + → spectrum.
Binâb-e bândi, from binâb, → spectrum + bândi, relating to bând, → band.
Fr.: bande passante
A range of frequencies that can pass through a filter such as one in an electrical circuit.
From → band + pass, from O.Fr. passer, from V.L. *passare "to step, walk, pass," from L. passus "step, pace;" cf. Pers. pâ "foot," pey "step."
Gozar-bând, from gozar "passage, transit, passing," gozaštan "to pass, cross, transit," from Mid.Pers. vitârtan + bând, → band.
Fr.: filtre de bande
An electric filter that transmits a known band of frequencies but suppresses unwanted frequencies above and below this band.
Fr.: largeur de bande
The portion of the electromagnetic spectrum that is permitted to pass through an electronic device, such as a radio telescope detector. The term refers to either a wavelength interval or a frequency interval.
Bandwidth, from → band + → width.
Bândpahnâ, from bând, → band, + pahnâ, → width, from pahn "wide," → broad.
Fr.: photométrie à bande large
Photometric measurements carried out through filters with a band-width (about one-tenth the central wavelength) in the range 30-100 nm. Typical examples are Johnson photometry, Krons-Cousins RI photometry, and the six-color system.
→ broad; → band; → photometry.
Fr.: bande de Chappuis
A band in the → absorption spectrum of → ozone (O3) extending in the → visible from 400 nm to 700 nm. → Hartley band, → Huggins band.
J. Chappuis, Acad. Sci., Paris, C. R. 91, 985 (1880).
Fr.: bande de conduction
In the energy spectrum of a solid, a range of energies in which electrons can move freely under the influence of an electrical field. Metals have many electrons in this range, insulators have none. In semiconductors the conduction band contains few electrons provided by impurity atoms or ejected from the valence bands by thermal energy or photon absorption.
→ conduction; → bande.
bând-e siyânožen (#)
Fr.: bande de cyanogène
An → absorption band of molecular origin characterizing the spectra of → late-type stars (G0 and later, e.g. → S star). → Cyanogen absorption is an important → luminosity criterion for → low-mass stars, and is more pronounced in → giant stars than in → dwarf stars of the same → spectral type.
diffuse interstellar band (DIB)
bând-e paxšide-ye andaraxtari
Fr.: bande diffuse interstellaire
Absorption features in the spectrum of stars identified in the ultraviolet, visible, and infrared regions. They have an interstellar origin, but despite extensive efforts, their carrier(s) have not yet been clearly identified. See also → Aromatic Infrared Bands; → polycyclic aromatic hydrocarbons.
→ diffuse; → interstellar; → band.
diffuse interstellar band carrier
barande-ye bând-e paxšide-ye andaraxtari
Fr.: porteur des bandes diffuses interstellaires
The chemical element or composition that is supposedly at the origin of a → diffuse interstellar band (DIB).
→ diffuse; → interstellar; → band; → carrier.
Fr.: bande d'émission
In a spectrum, a combination of several closely spaced, often unresolved, → emission lines occurring across a limited range of wavelengths.
Fr.: bande interdite
In → solid state physics, a range of → energy levels which is not attained by any electrons in a → crystal. In the energy level diagram forbidden bands appear as gaps between → allowed bands.
Fr.: bande de fréquence
A range of frequencies that is continuous between two specified limits, selected from a more extended range of frequencies.