An alternative form of acetometric, relating to the measurement and analysis of acetic acid content.
From acetometer + -ical (alternate adjective suffix, more formal than -ic). Both -ic and -ical forms exist in English scientific terminology with identical meanings.
The suffix -ical exists because English borrowed it from Latin and Greek alongside -ic, so you get pairs like 'historic/historical' and 'acetometric/acetometrical'—sometimes languages keep old forms just because they've always been around.
Complete word intelligence in one call. Free tier — 50 lookups/day.