1》 a strong-smelling underground fungus that resembles a rough-skinned potato, considered a culinary delicacy. [Family Tuberaceae.]
2》 a soft sweet made of a chocolate mixture.
■ verb [usu. as noun truffling ] hunt for ~s.
C16: prob. via Du. from obs. Fr. ~ , perh. based on L. tubera , plural of tuber 'hump, swelling'.