One of four equal parts.

synoniemen: fourth, fourth part, one-fourth, one-quarter, quarter, twenty-five percent.

Roget 97: quadrisection, quadripartition^†; quartering etc. v.; fourth; quart; quarter, quartern^†; farthing^†, fourthing; quadrant.   

Nederlands: kwart, vierde
Pools: ćwierć, jedna czwarta, czwarta część, 1/4, ćwiartka