n 1  cap  :  a genus of trees (family Flacourtiaceae) of Indonesia and Malaysia having alternate leaves, small dioecious racemose flowers, and capsular fruits of which several are sources of chaulmoogra oil and hydnocarpus oil  2  :  any tree of the genus Hydnocarpus .
 
 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2024.