PYRENE
- the hard covering of the kernel of certain fruits, also PUTAMEN [n -S]
- a putamen (the hard covering of the kernel of certain fruits) [n PYRENES]
- putamen or stone, esp. when there are several in a single fruit; nutlet
- polycyclic, aromatic crystalline hydrocarbon, C16H10, consisting of four fused benzene rings, found in coal tar and believed to be carcinogenic