the cardinal number that is the sum of nine and one; the base of the decimal system

a hat with a wide brim and a soft crown; worn by American ranch hands

having four sides

having many parts or sides

- five-sided
- four-sided
- trilateral
- quadrilateral
- tripartite
- multilateral
- three-way
- multipartite
- nine-sided
- two-sided
- ten-sided
- quadripartite
- deep-lobed
- eleven-sided
- two-lobed
- three-cornered
- four-lobed
- five-lobed
- two-way
- four-party
- triangular
- three-party
- palmately-lobed
- two-part
- eight-sided
- three-lobed
- twelve-sided
- bilateral
- joint
- tetramerous
- six-sided
- three-sided
- seven-sided
- many-lobed
- bipartite

having three sides