English word reaction comes from Latin re-, Latin agendum, and later Latin reactio ((physics, chemistry) reaction.)
Dictionary entry | Language | Definition |
---|---|---|
re- | Latin (lat) | Again; prefix added to various words to indicate an action being done again, or like the other usages indicated above under English.. Back, backwards. |
agendum | Latin (lat) | |
reago | Latin (lat) | |
reactio | Latin (lat) | (physics, chemistry) reaction. |
reaction | Old French (842-ca. 1400) (fro) | |
reaction | English (en) | (chemistry) A transformation in which one or more substances is converted into another by combination or decomposition. An action or statement in response to a stimulus or other event. |