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pho·no·car·di·o·graph

(fō′nə-kärdē-ə-grăf′)

An instrument consisting of microphones and recording equipment used to monitor and record heart sounds and murmurs.

pho′no·car′di·o·graphic adj.

pho′no·car′di·ogra·phy (-ŏgrə-fē) n.

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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