1. fulfilling the grammatical role of one of its constituents; - Example: "when `three blind mice' serves as a noun it is an endocentric construction"
WordNet (r) 3.0 (2006):
endocentric
adj 1: fulfilling the grammatical role of one of its
constituents; "when `three blind mice' serves as a noun
it is an endocentric construction" [ant: exocentric]