IPA: /prɪˈsaɪsər/
KK: /prɪˈsaɪsər/
More exact or accurate than something else.
The new measurements are preciser than the previous ones.
Preciser → It is formed from "pre-" (meaning before) and "cis" (from Latin "caedere", meaning to cut). The word "preciser" refers to someone or something that cuts or defines something more clearly or before others do.
Think of 'cutting' ('cis') something 'before' ('pre-') to make it clearer — that's why a preciser is someone who makes things more precise.