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The Usage Panel is a group of nearly 200 prominent scholars, creative writers, journalists, diplomats, and others in occupations requiring mastery of language. Annual surveys have gauged the acceptability of particular usages and grammatical constructions.
An ancient region of southern Greece occupying the northern part of the Peloponnesus on the Gulf of Corinth. The cities of the region banded together in the early third century BC to form the Achaean League, which defeated Sparta but was eventually beaten by the Romans, who annexed Achaea in 146 BC and later gave the name to a province that included all of Greece south of Thessaly.
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:
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.