"impedance" - key terms from Wikipedia

acoustic impedance
bioelectrical impedance	analysis
characteristic impedance
complex impedance
dc impedance	looking out
earth impedance
electrical impedance
high impedance
high input impedance
higher impedance
identical to the system impedance
impedance
impedance	and admittance
impedance	bridging
impedance	looking out of each
impedance	matching
impedance	mismatch
input impedance
load impedance
low impedance
magnitude of the impedance
mutual impedance
mutual impedance	between
negative impedance	converter
nominal system impedance
normalised impedance
normalised impedance	smith chart
output impedance
reactive impedance
regardless of impedance
series impedance
source impedance
surge impedance
system impedance
total impedance