Energy possessed by a substance in the form of kinetic energy of atomic or molecular translation, rotation, or vibration.
Heat, from O.E. hætu, hæto, from P.Gmc. *khaitin- "heat," from *khaitaz "hot" (cf. O.N. hiti, Ger. hitze "heat," Goth. heito "fever").
Garmâ "heat, warmth," from Mid.Pers. garmâg; O.Pers./Av. garəma- "hot, warm;" cf. Skt. gharmah "heat;" Gk. thermos "warm;" L. formus "warm," fornax "oven;" P.Gmc. *warmaz; O.E. wearm; E. warm; O.H.G., Ger. warm; PIE *ghworm-/*ghwerm- "warm."
gonjâyeš-e garmâyi (#)
Fr.: capacité thermique, ~ calorifique
The ratio of an amount of heat, dQ, transferred to a body in some process to the corresponding change in the temperature of the body: C = dQ/dT. The heat capacity depends upon the mass of the body, its chemical composition, thermodynamic state, and the kind of process employed to transfer the heat. The word "capacity" may be misleading because it suggests the essentially meaningless statement "the amount of heat a body can hold," whereas what is meant is the heat added per unit temperature rise. → specific heat.
Fr.: conduction de chaleur
A type of → heat transfer by means of molecular agitation within a material without any motion of the material as a whole.
hambaz-e garmâ (#)
Fr.: convection de chaleur
A type of → heat transfer involving mass motion of a fluid such as air or water when the heated fluid is caused to move away from the source of heat, carrying energy with it.
heat death of the Universe
marg-e garmâyi-ye giti (#)
Fr.: mort thermique de l'Univers
Assuming that the Universe is a thermodynamically → isolated system, a state of absolute uniformity in the Universe in which all temperature differences would reduce to zero and no energy will be available for use, according to the → second law of thermodynamics. In that condition of maximum → entropy, the Universe would be in a state of unchanging death. First introduced by the German physicist Hermann von Helmholtz (1821-1894) in 1854, on the basis of William Thomson's (1824-1907) idea.
heat of vaporization
Fr.: chaleur de vaporisation
The amount of heat energy required to transform an amount of a substance from the liquid phase to the gas phase. → molar heat of vaporization.
separ-e garmâyi (#), garmâ-separ
Fr.: bouclier thermique
A structure that protects against excessive heat, especially that which covers the vulnerable surfaces of a → spacecraft and protects it when re-entering the Earth's atmosphere.
Fr.: transfert de chaleur
The spontaneous transportation of heat through matter, from a region of higher temperature to a region of lower temperature.
celle-ye tâbestân (#)
Meteorology: A period of several successive days of abnormally hot and usually humid weather occurring in summer.
1) The process whereby a system's temperature increases.
The sky or Universe as seen from the Earth; the firmament. Often used in the plural.
From M.E. heven, O.E. heofon, possibly from P.Gmc. *khemina- (cf. M.L.G. heben, O.N. himinn, Goth. himins, Du. hemel, Ger. Himmel "heaven, sky"); PIE base *kem-/*kam- "to cover."
Âsmân, from Mid.Pers. âsmân "sky, heaven;" O.Pers. asman- "heaven;" Av. asman- "stone, sling-stone; heaven;" cf. Skt. áśman- "stone, rock, thunderbolt;" Gk. akmon "heaven, meteor, anvil;" Akmon was the father of Ouranos (Uranus), god of sky; Lith. akmuo "stone;" Rus. kamen; PIE base *akmon- "stone, sky." The link between the "stone" and "sky" concepts indicates that the sky had once been conceived as a stone vault by prehistoric Indo-Europeans.
Fr.: corps céleste
lâye-ye Heaviside (#)
Fr.: couche de Heaviside
English physicist Oliver Heaviside (1850-1925).
Of great weight; of great amount, quantity.
M.E. hevi; O.E. hefig, from P.Gmc. *khabigas (cf. O.N. hebig).
Sangin "heavy, weighty; stony, like stone, hard," from sang "stone, rock" (Mid.Pers. sang; O.Pers. aθanga-; Av. asenga- "stone" (related to Mod.Pers. âsmân "sky" → heaven); PIE *aken-) + -in adj. suffix.
bonpâr-e sangin (#)
Fr.: élément lourd
hidrožen-e sangin (#)
Fr.: hydrogène lourd
âb-e sangin (#)
Fr.: eau lourde
Water in which the hydrogen is replaced by → deuterium. Deuterium Oxide (D2O).
gâhšomâr-e yahud (#)
Fr.: calendrier hébreu
A → lunisolar calendar used by Jews for religious purposes. The year consists of 12 months alternating between 29 and 30 days, making a year of 354 days. In order to conform to the → solar year, a → leap month is included every third year. A month begins the day the new moon is first seen. The years are counted from the time of "creation," believed by Jewish theologians to have occurred in the year 3761 B.C. Also called → Jewish calendar.
Hebrew, from O.E., from O.Fr. Ebreu, from L. Hebraeus, from Gk. Hebraios, from Aramaic 'ebhrai, corresponding to Heb. 'ibhri "an Israelite," literally "one from the other side," in reference to the River Euphrates, or perhaps simply denoting "immigrant;" from 'ebher "region on the other or opposite side;" → calendar.
A prefix meaning hundred (102) used in the formation of compound words.
From Fr., from Gk. hekaton "hundred."
Hekto-, loanword from Fr., as above.
bolandi (#), bolandâ (#), farâzâ (#)
Distance upward from a given level to a fixed point.
M.E., from O.E. hiehthu; → high + -th a suffix forming nouns of action (e.g., birth) or abstract nouns denoting quality or condition (depth; length; warmth).
Bolandi, bolandâ "height," noun forms from boland
"high," variants bâlâ
"up, above, high, elevated, height," borz "height, magnitude"
(it occurs also in the name of the mountain chain Alborz),
Lori dialect berg "hill, mountain;"
Mid.Pers. buland "high;" O.Pers. baršan- "height;"
Av. barəz- "high, mount," barezan- "height;" cf.
Skt. bhrant- "high;" L. fortis "strong" (Fr. & E. force);
O.E. burg, burh "castle, fortified place," from P.Gmc.
*burgs "fortress;" Ger. Burg "castle," Goth. baurgs "city,"
E. burg, borough, Fr. bourgeois, bourgeoisie, faubourg);
PIE base *bhergh- "high."