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polycyclic aromatic hydrocarbons (PAHs) hidrocarburhâ-ye aromâtik-e polisiklik, ~ ~ bol-carxe-yi Fr.: hydrocarbures aromatiques polycycliques 1) Chemistry: A family of → organic molecules composed
of carbon and hydrogen atoms (→ hydrocarbons) in which
→ carbon atoms appear in multiple loops (polycyclic)
with strong chemical → bonds that exist between them (aromatic).
PAHs are formed during the incomplete burning of coal, oil and gas, garbage, or other
organic substances like tobacco or charbroiled meat. As a pollutant, they are of
concern because some compounds (benzo(a)pyrene) have been identified as tending to
cause cancer. → poly-; → cyclic; → aromatic; → hydrocarbon. |
polydeism bol-dâdâr-bâvari, cand-dâdâr-bâvari Fr.: polydéisme A kind of → deism according to which multiple deities created the Universe, but do not interact with the physical world. → polytheism. |
polygon candbar (#) Fr.: polygone A one-dimensional closed figure consisting of a series of points, each of which is called a → vertex, and the line segments, called → sides, joining the vertices. Polygons of three sides are called → triangles, and of four sides → quadrilaterals. |
polyhedron boldimé Fr.: polyèdre 1) Geometry: A three-dimensional figure formed by several
→ polygons. |
polynomial bolnâmin Fr.: 1) polynôme; 2) polynomial 1) A mathematical expression involving a sum of powers in one or more
variables multiplied by coefficients. |
polynomial equation hamugeš-e bolnâmin Fr.: équation polynomiale An equation of the form a_{0} + a_{1}x + a_{2}x^{2} + ... + a_{n}x^{n}, where a_{0} ... a_{n} are → real numbers and a_{n}≠ 0. Same as → algebraic equation. → polynomial; → equation. |
polysemy bolcemi Fr.: polisémie Diversity of meanings. From N.L. polysemia, from L. polysemus "with many significations" (from Gk. polysemos, from → poly- + sem, from sema "sign," → semantic, + adj. suffix -os), + -ia. Bolcemi, from bol, → poly-, + cem, → meaning, + noun suffix -i. |
polytheism bol-yazdân-bâvari, cand-yazdân-bâvari Fr.: polythéisme The doctrine of or belief in more than one god or in many gods (Dictionary.com). → polydeism. |
polytrope bolgašt Fr.: polytrope In astrophysics, a gaseous sphere in hydrodynamic equilibrium in which the pressure and density are related by the equation P = Kρ^{(n+1)/n} at each point along the radius, where K is a constant and n is the → polytropic index. The constant K depends upon the nature of the polytrope. Before the advent of computing technology, the theory of polytropes played an important role in physically modeling the structure of stars. → Lane-Emden equation. Polytrope, from → poly- + trope, from → -tropic. Bolgašt, from bol-, → poly-, + gašt "change, alteration," → -tropic. |
polytropic bolgašti Fr.: polytropique 1) Math.: Describing a function which has different values for one variable. |
polytropic change degaršod-e bolgašti, degareš-e ~ Fr.: changement polytropique A change in the → pressure or → volume of a → gas in a → polytropic process. → polytropic; → change. |
polytropic gas gâz-e bolgašti Fr.: gaz polytropique A gas capable of undergoing a → polytropic process. → polytropic; → gas. |
polytropic index dišan-e bolgašt Fr.: index polytropique A number appearing in the equation describing a → polytropic process. → polytropic; → index. |
polytropic process farâravand-e bolgašti Fr.: processus polytropique A thermodynamic process that obeys the relation:
PV^{n} = C, where P is pressure, V is volume,
n is any real number, called the → polytropic index, and
C is a constant. → polytropic; → process. |
polyvalent bol-arz Fr.: polyvalent 1) Chem.: Having more than one → valence. |
polyvalent logic guyik-e bol-arz Fr.: logique polyvalente A system of logic with more than two → truth values, as opposed to → classical logic. A polyvalent logic may have a continuous scale of values with → true and → false as limiting → extremes. → polyvalent; → logic. |
pool 1) kul; 2) kulidan Fr.: 1) fond commun; 2) mettre en commun 1) Any combination of resources put together to be shared in community, such as
memory pool, storage pool. 1) M.E., O.E. pol, akin to Du. poel, O.H.G. pfuol, Ger. Pfuhl
"puddle." Kul "pond, pool, reservoir," variants kulâb, qulé, farqar, related to kulidan "to dig, excavate," Mid.Pers. kwl "pit, sink, cavity." |
pooling kuleš Fr.: mise en commun The act or result of putting resources into a pool or common stock by agreement. Verbal noun of → pool. |
poor kam-, kamdâr Fr.: pauvre Lacking an expected supply of something specified. M.E. pov(e)re, from O.Fr. povre, from L. pauper "poor," perhaps a compound of paucus "little" and parare "to get." Kam "little, few; deficient, wanting; scarce" (Mid.Pers. kam "little, small, few;" O.Pers./Av. kamna- "small, few," related to keh "small, little, slender" (related to kâstan, kâhidan "to decrease, lessen, diminish," from Mid.Pers. kâhitan, kâstan, kâhênitan "to decrease, diminish, lessen;" Av. kasu- "small, little;" Proto-Iranian *kas- "to be small, diminish, lessen") kamdâr, literally "having little possession," from kam + dâr "having, possessor," from dâštan "to have, to possess," Mid.Pers. dâštan; O.Pers./Av. root dar- "to hold, keep back, maintain, keep in mind;" Skt. dhr-, dharma- "law;" Gk. thronos "elevated seat, throne;" L. firmus "firm, stable;" Lith. daryti "to make;" PIE *dher- "to hold, support." |
popular 1) mardom-pasand; 2) mardomâné Fr.: populaire 1) Accepted, followed, used, or done by many people. M.E., from M.Fr. populier, from L. popularis "belonging to the people, general, common; devoted to or accepted by the people; democratic," from populus "people," → population. Mardom-pasand, from mardom, → people, + pasand agent noun from pasandidan "to approve, cherish;" Mid.Pers. passandidan "to like, approve, appreciate;" ultimately from Proto-Ir. *pati-sand- "to appreciate; "from *sand- "to appear, seem (good);" cf. Av. sənd- "to appear; seem (good);" O.Pers. θand- "to seem;" Skt. chand- "to appear, to please;" L. censo "I approve, judge." Mardomâné from mardom + -âné suffix with several significations: similarity, manner, ability, suitability, property, possession, etc., from Mid.Pers. -ânag. |
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