1 A doohickey is an apple corer, peeler and slicer.

2 This doohickey is one of the greatest inventions of all time.

3 I want the doohickey in the middle of the bench.

4 As the doohickey hummed away at a very high frequency—a whopping 6 billion cycles per second—the "piezoelectric" material in it produced a warbling electric field that was easy to detect.

5 LL : Well, first you stick the entire doohickey on a flat surface of a table.

6 LL: Put the apple here like this And then turn the handle the doohickey.