What does reactiveness mean?
Reactiveness is the noun form of reactive, describing a quality of readiness to respond. It can refer to a person's quick emotional or behavioral response, as in someone whose reactiveness to criticism is intense, or to the property of being easily stimulated or changed by an external influence. In scientific writing, reactiveness more often describes how readily a substance participates in a chemical or physical reaction. The word is related to responsiveness but tends to emphasize the capacity or speed of reacting rather than general effectiveness in meeting needs. It is useful when discussing systems, people, or materials whose reactions to stimuli are especially noticeable, rapid, or sensitive.
nounThe quality or condition of being reactive, especially of responding quickly or readily to external stimuli. It can also refer to the degree to which a system undergoes chemical change or reaction.
- The quality or condition of being reactive, especially of responding quickly or readily to stimuli.
- The degree to which a substance or system undergoes chemical or physical reaction.
"The material's rapid reactiveness made it unsuitable for use in high-temperature environments."
"The cells showed unusually high reactiveness to the new compound."
"His reactiveness to criticism revealed how quickly he became defensive."
Reactiveness names the split second between a stimulus arriving and a response beginning.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does reactiveness come from?
Reactiveness was formed in the 19th century from reactive, which in turn comes from the Latin prefix re- and the verb act, meaning to do or act. The related word reaction developed through the same root and initially referred to an action or response, before acquiring its modern scientific meanings. Cognates in other languages include the French réactif and related forms based on the same Latin roots.
Related word forms
How reactiveness is actually used
Reactiveness is less common than responsiveness in general usage. In scientific and technical contexts, it is often used for the tendency of a substance or system to react, particularly to a stimulus or chemical change.
Easily confused with reactiveness
Reactiveness usually means the general quality of responding readily, while reactivity often has a more technical focus on the rate or degree of a chemical or physical reaction.