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tac·to·re·cep·tor

(tăktō-rĭ-sĕp′tər)

A receptor that responds to touch.

[Latin tāctus, touch (from past participle of tangere, to touch; see tag- in the Appendix of Indo-European roots) + RECEPTOR.]

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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