Dictionary

Any member of the taxonomic subclass Theria, the placental and marsupial mammals.

Of or pertaining to the taxonomic subclass Theria.

Any mythical being which is part human, part animal.

(sometimes furry fandom slang) Someone with an intense spiritual or psychological identification as a non-human animal.

Example: Therianthropes don't feel a need to dress in fursuits, because they believe they already are their animal, inside.