Tractor \Tract"or\, n. An a["e]roplane flying machine having one or more tractor screws.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Tractor \Tract"or\, n. [NL., from L. trahere, tractum, to draw.]

1. That which draws, or is used for drawing.

2. pl. (Med.) Two small, pointed rods of metal, formerly used in the treatment called Perkinism.

Source: Webster's Revised Unabridged Dictionary (1913)