Definition from Wiktionary, the free dictionary
therianthrope (plural therianthropes)
- Any mythical being which is part human, part animal.
- (furry fandom slang) Someone with an intense spiritual or psychological identification with a non-human animal.
- Therianthropes don't feel a need to dress in fursuits, because they believe they already are their animal, inside.
- (furry slang): therian