Dictionary
impedance
noun im·ped·ance \im-ˈpē-dən(t)s\
Definition of IMPEDANCE
: something that impedes : hindrance: as a : the apparent opposition in an electrical circuit to the flow of an alternating current that is analogous to the actual electrical resistance to a direct current and that is the ratio of effective electromotive force to the effective current b : the ratio of the pressure to the volume displacement at a given surface in a sound-transmitting medium
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First Known Use of IMPEDANCE
1886
Medical Dictionary
impedance
noun im·ped·ance \im-ˈpēd-ən(t)s\
Medical Definition of IMPEDANCE
1
: the apparent opposition in an electrical circuit to the flow of an alternating current that is analogous to the actual electrical resistance to a direct current and that is the ratio of effective electromotive force to the effective current
2
: the ratio of the pressure to the volume displacement at a given surface in a sound-transmitting medium
3
: opposition to blood flow in the circulatory system
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