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1 the process of pulling a baby's head with obstetric forceps in a direction in line with the path of least resistance, following the curve of Carus through the mother's birth canal.
Usage notes: (informal)any mechanical device attached to obstetric forceps to facilitate pulling in the proper direction.
Traction in line with the long axis of a course through which a body is to be drawn.Synonym: in-line traction
See also: traction