linguate
/ˈlɪŋɡweɪt/ /ˈlɪŋɡwət/adjective
Tongue-shaped. In later use chiefly Archaeol. with reference to flint tools or weapons.
noun
Archaeol. A tongue-shaped flint tool or weapon.
Origin
Mid 19th century. From post-classical Latin linguatus tongue-shaped, earlier in sense ‘eloquent’ (early 3rd cent. in Tertullian) from classical Latin lingua tongue + -ātus.