- consisting of or divided into four parts.
- Botany. (of flowers) having the parts of a whorl arranged in fours or multiples of four.
- (esp of animals or plants) having or consisting of four parts
- (of certain flowers) having parts arranged in whorls of four members
- Having four similar segments or parts.
- Having flower parts, such as petals, sepals, and stamens, in sets of four.