equivalent hamug-arz Fr.: équivalent Equal in value, measure, force, effect, significance, etc. From L.L. æquivalentem (nominative æquivalens) "equivalent," p.p. of æquivalere "be equivalent," from L. æquus, → equal + valere "to be worth; be strong." Hamug-arz, from hamug-, → equi-, + arz stem of arzidan "to be worth," arzân "worthy; of small value, cheap," arj "esteem, honour, price, worth;" Mid.Pers. arz "value, worth," arzidan "be worth," arzân "valuable;" Av. arəjaiti "is worth," arəja- "valuable," arəg- "to be worth;" cf. Skt. arh- "to be worth, to earn," árhant- "worthy person;" Gk. alphanein "to bring in as profit," alphein "to ear, obtain;" Lith. algà "salary, pay;" PIE base *alg^{w}h- "to earn; price, value." |
equivalent depth žarfâ-ye ham-arz Fr.: profondeur équivalente A measure of the number of particles passing a given point in a → planetary ring per unit time. It is obtained by multiplying the physical width of the ring by its average → optical depth. For the variable-width eccentric rings of → Uranus, equivalent depth remains almost constant around a given ring (Ellis et al., 2007, Planetary Ring Systems, Springer). → equivalent; → depth. |
equivalent positions nehešhâ-ye hamug-arz Fr.: Complete set of points in any given space group which are obtained by performing the symmetry operations of the space group on a single point (x, y, z). → equivalent; → position. |
equivalent width pahnâ-ye hamug-arz Fr.: largeur équivalente 1) A measure of the → strength of a
→ spectral line. The equivalent width is the width of a
→ rectangle centered on a spectral line that, on a plot of
→ intensity against → wavelength,
has the same → area as the line. → equivalent; → width. |
logically equivalent guyikâné hamug-arz Fr.: logiquement équivalent Describing two → compound propositions → if and only if they have the same → truth table. → logical; → equivalent. |
mechanical equivalent of heat ham-arz-e mekâniki-ye garmâ (#) Fr.: équivalent mécanique de chaleur Same as → Joule's constant. → mechanical; → equivalent; → heat. |
noise-equivalent power tavân-e ham-arz-e nufé Fr.: puissance équivalente de bruit A measure of the sensitivity of an electronic detector, defined as the power input to the detector that will create a signal to noise ratio of one for an integration time of half a second. → noise; → equivalent; → power. |
TNT equivalent hamug-arz-e TNT Fr.: équivalent TNT A measure of the explosive strength of a nuclear bomb, expressed in terms of the weight of → trinitrotoluene which could release the same amount of energy when exploded. The Hiroshima atomic (fission) bomb created a blast equivalent to 16 kilotons of TNT. The first hydrogen (thermonuclear) bomb test released an energy of about 10 megatons of TNT. See also → megaton of TNT. |