impedance

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im·ped·ance

 (ĭm-pēd′ns)
n.
1. Symbol Z A measure of the total opposition to current flow in an alternating current circuit, made up of two components, ohmic resistance and reactance, and usually represented in complex notation as Z = R + iX, where R is the ohmic resistance and X is the reactance.
2. An analogous measure of resistance to an alternating effect, as the resistance to vibration of the medium in sound transmission.

impedance

(ɪmˈpiːdəns)
n
1. (Electronics) a measure of the opposition to the flow of an alternating current equal to the square root of the sum of the squares of the resistance and the reactance, expressed in ohms. Symbol: Z
2. (Electronics) a component that offers impedance
3. (General Physics) Also called: acoustic impedance the ratio of the sound pressure in a medium to the rate of alternating flow of the medium through a specified surface due to the sound wave. Symbol: Za
4. (General Physics) Also called: mechanical impedance the ratio of the mechanical force, acting in the direction of motion, to the velocity of the resulting vibration. Symbol: Zm

im•ped•ance

(ɪmˈpid ns)

n.
1. the total opposition to alternating current by an electric circuit, equal to the square root of the sum of the squares of the resistance and reactance of the circuit and usu. expressed in ohms.
2. the ratio of the force on a system undergoing harmonic motion to the velocity of the particles in the system.
[1886]

im·ped·ance

(ĭm-pēd′ns)
A measure of the opposition to the flow of an electric current through a circuit of alternating current. Impedance is measured in ohms.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.impedance - a material's opposition to the flow of electric currentimpedance - a material's opposition to the flow of electric current; measured in ohms
electrical phenomenon - a physical phenomenon involving electricity
ohmage - the ohmic resistance of a conductor
Translations
impedanssi
impedancija
impedancia

impedance

[ɪmˈpiːdəns] N (Elec) → impedancia f
References in periodicals archive ?
Is bioelectrical impedance accurate for use in large epidemiological studies?
Measurements of body composition were performed using bioelectrical impedance analysis (BIA), with the InBody 720 Tetrapolar 8Point Tactile Electrode System (Biospace Co.
A previous study suggested using bioelectrical impedance vector analysis (BIVA) in the clinical evaluation of volume balance.
Evaluation of two foot-to-foot bioelectrical impedance analysers to assess body composition in overweight and obese adolescents.
Objective: To compare three different body fats estimation equations using skin fold measurements with bioelectrical impedance analysis.
Of the various methods available to assess BFP, bioelectrical impedance analysis (BIA) technique is practical, inexpensive, relatively easy to use in large field studies and reliable for evaluating body fatness in children.
Bioelectrical impedance assay to monitor changes in cell shape during apoptosis.
height, weight, and percent body fat) was determined by the bioelectrical impedance method using a standardized body composition analyzer (bioelectrical impedance analyzer, ioi 353, Jawon Medical, Korea).
One common method for estimating body composition is bioelectrical impedance analysis (BIA), which estimates body composition using a small undetectable electrical current passed through the body, but this has not been validated for use in individuals with SCI.
The small form-factor, comfortable-to-wear health patch has been optimized for low power consumption and is the first of its kind to track physical and cardiac activity while monitoring bioelectrical impedance.
Body composition was assessed by bioelectrical impedance analysis using segmental body composition analyser.