yellow-eyed grass family yel·lo·weyedg·rassfamily uncommon noun 1. plants of tropical to temperate regions; usually in wet places SynonymsXyridaceaefamily Xyridaceaeyellow-eyed grass family Related words Broader terms monocot family Parts Xyridales Part of Xyris WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.