-pic·rin
\ˈpikrə̇n\  noun suffix 
(-s) 
Etymology: International Scientific Vocabulary -picr- (from Greek pikros bitter) + -in 
1. : bitter substance 
< gentiopicrin >
2. : substance related to picric acid 
< chloropicrin >
1.
< gentiopicrin >
2.
< chloropicrin >