a. [ Cf. AS. nigonteóða. ] 1. Following the eighteenth and preceding the twentieth; coming after eighteen others. [ 1913 Webster ]
2. Constituting or being one of nineteen equal parts into which anything is divided. [ 1913 Webster ]
n. 1. The quotient of a unit divided by nineteen; one of nineteen equal parts of anything. [ 1913 Webster ]
2. The next in order after the eighteenth. [ 1913 Webster ]
3. (Mus.) An interval of two octaves and a fifth. [ 1913 Webster ]