English Explanatory Dictionary

impedance

English dictionary entry

Meanings

noun
  1. The act of impeding; that which impedes; a hindrance.
  2. A measure of the opposition to the flow of an alternating current in a circuit; the aggregation of its resistance, and inductive and capacitive reactances; the ratio of voltage to current treated as complex quantities.
  3. A quantity analogous to electrical impedance in some other energy domain
  4. a measure of opposition to motion of something subjected to a force; the ratio of force to velocity treated as complex quantities.
  5. the ratio of sound pressure to volume flow rate treated as complex quantities.

Pronunciation

[ɪmˈpiːdn̩s] LL-Q1860 (eng)-Rho9998-impedance.wav [ɪmˈpidn̩s] LL-Q1860 (eng)-Vininn126-impedance.wav

Word forms

impedance impedances

Etymology

From impede + -ance. In sense 2 and sense 3 it was coined by English mathematician and physicist Oliver Heaviside in 1886.

Related words

impediment

Derived words

acoustic impedance bioimpedance cardioimpedance characteristic impedance electrical impedance tomography image impedance immittance impedance coil impedancemetry impedance mismatch impedance of free space impedance plethysmography magnetoimpedance microimpedance photoimpedance radiation impedance tuboimpedance

Translations

Basque: inpedantzia Bulgarian: импеданс Chinese Mandarin: 阻抗 Czech: impedance Dutch: impedantie Esperanto: impedanco Estonian: impedants Finnish: impedanssi French: impédance German: Impedanz Greek: εμπέδηση Greek: σύνθετη αντίσταση Hindi: प्रतिबाधा Hungarian: impedancia Indonesian: impedans Indonesian: impedansi Irish: coisceas Italian: impedenza Japanese: インピーダンス Korean: 온저항 Manx: castid Manx: castys Māori: haukotinga Māori: whakararu Persian: امپدانس Polish: impedancja Portuguese: impedância Romanian: impedanță Russian: импеда́нс Serbo-Croatian: impedancija Spanish: impedancia Turkish: empedans
This entry uses open data from Wiktionary (CC BY-SA/GFDL). Word forms are used for search and are not indexed as separate pages.
Back to search All on I Russian dictionary Dahl dictionary