dy·na·mom·e·ter 
(dī′nə-mŏmĭ-tər)
(dī′nə-mŏmĭ-tər)n.
Any of several instruments used to measure mechanical power.
[French dynamomètre : Greek dunamis, power; see DYNAMIC + -mètre, -meter.]
dy′na·mo·metric (-mō-mĕtrĭk), dy′na·mo·metri·cal (-rĭ-kəl) adj.
dy′na·mome·try n.