In biology, trinomial nomenclature refers to names for taxa below the rank of species. This is different for animals and plants:
- for animals see trinomen. There is only one rank allowed below the rank of species: subspecies.
- for plants see ternary name. There is an indeterminate number of infraspecific ranks allowed below the level of species: subspecies is the highest ranked of these.
Word origin
Latin. Literally meaning a three-name naming system.
See also
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