Below are Specialized Databases, Online Encyclopedia's etc...
A database of encyclopedias, almanacs, dictionaries and specialized reference sources for multidisciplinary research. it is an excellent resource for general overviews.
Access through Lehman is unavailable at this time.
Please access via NYPL using the link below:
https://libguides.nypl.org/oed
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Guide to the meaning, history and pronunciation of half a million words.