triturate

To grind to a fine powder, to pulverize.

To mix two solid reactants by repeated grinding and stirring.

To break up biological tissue into individual cells via passage through a narrow opening such as a hypodermic needle.

Just over the external jugular vein there were two punctures, not large, but not wholesome-looking. There was no sign of disease, but the edges were white and worn-looking, as if by some trituration.