Putamen

·noun The shell of a nut; the stone of a drupe fruit. ·see Endocarp.

putamen
pŭtāmen, ĭnis, n. [puto], that which falls off in pruning or trimming , clippings , waste; shell...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
putamen
putāmen inis, n puto, that which is pruned away, clippings, waste, shells : iuglandium. ...

An Elementary Latin Dictionary