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lith·o·stra·tig·ra·phy

(lĭth′ō-strə-tĭgrə-fē)

1. Stratigraphy based on the physical and petrographic properties of rocks.

2. Interpretation of the physical characters of sedimentary rocks.

lith′o·strat′i·graphic (-străt′ĭ-grăfĭk) adj.

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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