Meaning of promontorial in English:
promontorial
Pronunciation /ˌprɒm(ə)nˈtɔːriəl/
adjective
rare Of, relating to, or resembling a promontory.
Origin
Mid 19th century; earliest use found in George A. Sala (1828–1895), journalist. From promontory or its etymon classical Latin prōmontōrium + -al.