Meaning of linear-tracking

lin•e•ar-track•ing

Pronunciation: (lin'ē-ur-trak'ing), [key]
— adj.
  1. (of a tone arm) designed to move across a phonograph record in a straight line, instead of an arc, so that as the needle tracks the groove, its orientation remains unchanged.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.