Relating to or based on the measurement of pain using scientific instruments or methods.
From algometric + -al suffix. This is a variant or more formal elaboration of 'algometric,' following English patterns of adding -al for emphasis or formality in scientific terminology.
The existence of both 'algometric' and 'algometrical' shows how English scientific language develops multiple forms to express subtle gradations of precision—they mean essentially the same thing, but 'algometrical' sounds even more formal and rigorous.
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