The Collaborative International Dictionary of English v.0.48:
one-fourth \one-fourth\ n. A quarter; a fourth part. Syn: fourth, quarter, fourth part, twenty-five percent, quartern. [WordNet 1.5]WordNet (r) 3.0 (2006):
one-fourth n 1: one of four equal parts; "a quarter of a pound" [syn: one- fourth, fourth, one-quarter, quarter, fourth part, twenty-five percent, quartern]