tax·on 
(tăksŏn′)
(tăksŏn′)n. pl. tax·a (tăksə)
A taxonomic category or group, such as a phylum, order, family, genus, or species.
[New Latin, back formation from TAXONOMY.]
- prothonotary
- prothonotary apostolic
- prothonotary apostolic
- prothonotary warbler
- prothoracic
- prothoracic gland
- prothorax
- prothrombin
- protist
- protistan
- protistology
- protium
- proto-
- Proto-Algonquian
- protoceratops
- protocol
- protocolar
- protocolary
- protoctist
- protoderm
- protodermal
- protogalaxy
- Proto-Germanic
- protogynous
- protogyny