Adjective
monostable (not comparable)
(electronics) Having more than one state, only one of which is stable.
Circuit In the monostable multivibrator, the one resistive-capacitive network (C 2 -R 3 in figure 1 of Multivibrator ) is replaced by a resistive network (just a resistor). Source: Internet
When triggered by an input pulse, a monostable multivibrator will switch to its unstable position for a period of time, and then return to its stable state. Source: Internet
If repeated application of the input pulse maintains the circuit in the unstable state, it is called a retriggerable monostable. Source: Internet