Noun
responsive to stimulation
ready susceptibility to chemical change
Source: WordNetMindfulness gives you time. Time gives you choices. Choices, skillfully made, lead to freedom. You don't have to be swept away by your feeling. You can respond with wisdom and kindness rather than habit and reactivity. Henepola Gunaratana
Reactivity is enslavement. Responsibility is freedom. Jaggi Vasudev
15,000-watt xenon short-arc lamp used in IMAX projectors Noble gases are commonly used in lighting because of their lack of chemical reactivity. Source: Internet
Alpha-halogenation This reactivity is similar to the tendency of ethers with alpha hydrogen atoms to form peroxides. Source: Internet
A final problem was the effect that increased material temperature had on the relative electrochemical reactivity of the base metal and its alloying constituents. Source: Internet
As a result, console programs usually polled the keyboard and the mouse alternately, which resulted in wasted CPU and a characteristic "jerky" reactivity to user input. Source: Internet