| energetic | <chemistry, physiology> Exhibiting energy: strenuous, operating with force, vigour or effect. (18 Nov 1997) |
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| energetics | <study> That branch of science which treats of the laws governing the physical or mechanical, in distinction from the vital, forces, and which comprehends the consideration and general investigation of the whole range of the forces concerned in physical phenomena. (03 Mar 1998) |