The label in question was one he disliked so much that he preferred to put it between quotation marks (as if handling it with a pair of tweezers) and to insert a hyphen (as if to deny it the dignity of being a real word).

NEWYORKER: Politics and Prose

Three strands of DNA were synthesized so that when they were put into a test tube, they immediately became a molecular motor--a pair of DNA tweezers, held together at one end by a third piece of DNA that could be made to open and shut by adding or subtracting a fourth DNA strand.

FORBES: DNA May Make Computers, Not Run Them