(of a construction) not fulfilling the grammatical role of any of its constituents; as in until last Easter, where the constituents are prepositional, adjectival, and nominal, while the whole construction is adverbial
Compare endocentric
exocentric in American English
(ˌɛksoʊˈsɛntrɪk)
US
adjective
Linguistics
designating or of a construction whose syntactic function is different from that of any of its constituents (Ex.: all the way in the sentence “he ran all the way”)