Mid 17th century; earliest use found in John Donne (1572–1631), poet and Church of England clergyman. From post-classical Latin labyrinthicus labyrinthic + -al.
Definition of labyrinthical in US English:
labyrinthical
adjectiveˌlab(ə)ˈrɪnθɪkl
Labyrinthine.
Origin
Mid 17th century; earliest use found in John Donne (1572–1631), poet and Church of England clergyman. From post-classical Latin labyrinthicus labyrinthic + -al.