Main Entry:

sen·na

Pronunciation:

\ˈse-nə\

Function:

noun

Etymology:

New Latin, from Arabic sanā

Date:

1543

1: any of a genus (Cassia syn. Senna) of leguminous herbs, shrubs, and trees native to warm regions ; especially : one used medicinally2: the dried leaflets or pods of various sennas (especially C. angustifolia syn. Senna alexandrina) used as a purgative