Of or relating to the measurement and study of force and power; having the character of force measurement.
From 'dynametric' plus '-al' (an adjective suffix), this is the longer, more formal variant of the same root term. The double suffix creates a more elaborate technical adjective common in older scientific writing.
The shift from 'dynametric' to 'dynametrical' represents Victorian-era pedantry—adding '-al' was considered more scholarly, which is why older physics papers look so adorned with extra syllables compared to modern terse scientific writing!
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