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| | § 55. uni-. 8. Word Formation. The American Heritage Book of English Usage. 1996 |
 | | The basic meaning of the prefix uni- is one. It comes from the Latin prefix uni-, from the word unus, meaning one. Many English words beginning with uni- were formed in Latin. |
 | | Uniform comes from uni- plus forma, shape, and means always the same or literally one shape. And unison, which comes from uni- plus sonus, sound, means literally one sound. The majority of new words with uni-, such as unicellular, unicycle, unilateral, and univalent, are from the 19th century. |
 | | Uni- can be compared to the prefix mono-, which is from Greek. |
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