1. The performance of any of the vital functions, the manner of such performance, or the result of the same.
2. The exertion of any force or power, physical, chemical, or mental. For the actions of some chemical substances, see under the substance.
Origin
[L. actio, from ago, pp. actus, to do]
ball valve action
calorigenic action
cumulative action
salt action
sparing action
specific action
specific dynamic action
thermogenic action