mechanician

noun

1. (dated)One skilled in the theory or construction of machines.

   “To build such a device will require an expert mechanician.”

   “The Cotton-Gin is a machine to separate the seeds from cotton, invented by that celebrated mechanician, E. Whitney. -- from the 1828 Webster's Dictionary.”

   “The Yankees, the first mechanicians in the world, are engineers—just as the Italians are musicians and the Germans metaphysicians—by right of birth.”

   “a'''1891, Constance Garnett (translator), Leo Tolstoy (author), Anna Karenin, in The Harvard Classics Shelf of Fiction, P.F. Collier & son (1917), page 214, "The mechanician came when I was away; I haven't seen him yet," he said, not looking at her.”

2. (dated)One skilled in building, using, or repairing machines, or who makes machines or tools.

   “Shortly after being removed to the hospital Wright recovered consciousness and sent for Taylor, his mechanician. -- "Fatal fall of Wright airship", New York Times September 18th 1908”

3. (dated)One skilled in mechanics.
4. (dated)A machinist.
5. (dated)A scientifically trained practitioner.
6. (dated)A mechanic.