Search Result for "time constant":
Wordnet 3.0

NOUN (2)

1. (electronics) the time required for the current or voltage in a circuit to rise or fall exponentially through approximately 63 per cent of its amplitude;

2. the ratio of the inductance of a circuit in henries to its resistance in ohms; 



WordNet (r) 3.0 (2006):

time constant
    n 1: (electronics) the time required for the current or voltage
         in a circuit to rise or fall exponentially through
         approximately 63 per cent of its amplitude
    2: the ratio of the inductance of a circuit in henries to its
       resistance in ohms