| 1 | English | taxon | A group of one or more populations of an organism... |
| 2 | English | taxonomy | The science or the technique used to make a... |
| 3 | French | taxonomie | Alternative form of taxinomie |
| 4 | English | taxo- | order, arrangement |
| 5 | Ancient Greek | τάξις | arrangement, ordering; battle array, order of... |
| 6 | Ancient Greek | -σῐς | "suffix forming nouns" |
| 7 | Ancient Greek | -τις | Earlier form of -σις , retained after dentals δ,... |
| 8 | Proto-Indo-European | -tis | Derives abstract/action nouns from verb roots |