1) Grammar 
of a linguistic compound, having a different grammatical function than its parts
[adj] - grammar
adjective not fulfilling the same grammatical role of any of its constituents; `when `until last Easter` serves as an adverb it is an exocentric construction`
not having the same syntactic function in the sentence as any one of its immediate constituents. In the garden is an exocentric construction, since it does not function in the same way as the noun garden. The noun bittersweet is an exocentric compound, since it is a noun but its elements are both adjectives. Cf. endocentric.