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track·ing

(trăkĭng)

1. The placing of students in any of several courses of study according to ability, achievement, or needs. Also called ability grouping.

2. The position of a magnetic tape as it moves across magnetic heads, as in a VCR.

3. The lateral pressure of a phonograph needle as it tracks in a groove.

Indo-European & Semitic Roots Appendices

Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

Indo-European Roots

Semitic Roots

The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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