Where does “polyquat” come from?

polyquat (English) comes from English quat, from English Quaternary, from Latin quaternārius, from Latin quaternus, from Latin quater, from Latin quattŭor, from Portuguese quarto, from Old Portuguese quarto — and.

polyquat (English): Any of several quaternary ammonium compounds that are used as algicides

Definitions

  1. Any of several quaternary ammonium compounds that are used as algicides

Ancestry of “polyquat”, step by step

StepLanguageWordMeaning
1EnglishquatA pustule; An annoying, worthless person; To...
2EnglishQuaternaryThe geological period of the Cenozoic Era immediately following the Tertiary. It is subdivided into the Pleistocene and the Holocene Epochs
3Latinquaternāriuscontaining or consisting of four things
4Latinquaternusfour each; four at a time
5Latinquaterfour times
6Latinquattŭorfour; 4
7Portuguesequartoordinal form of quatro; fourth; quarter; fourth;...
8Old Portuguesequartoquarter
9Latinquārtusfourth
10Proto-Indo-Europeankʷeturtos
11Proto-Indo-Europeankʷetwóresfour
12Proto-Indo-Europeankʷe-and
Every word from Proto-Indo-European kʷe-