coring
Webster's Dictionary (GCIDE)
1.To take out the core or inward parts of; as, to core an apple. [1913 Webster]
He's like a corn upon my great toe . . . he must be cored out.— Marston.[1913 Webster]
2.To form by means of a core, as a hole in a casting. [1913 Webster]
3.To extract a cylindrical sample from, with a boring device. See core[8]. [PJC]