co·yol \(ˈ)kō|yōl, kəˈy-\noun alsocoyol palm (-s) Etymology: Mexican Spanish coyol, from Nahuatl coyoli, literally, bell; from the shape of the fruit and the rattle made by the dried fruit when shaken 1.: any of several tropical American palms of the genus Acrocomia (especially A. vinifera) 2.: the fiber of a coyol