proto-form

[ proh-toh-fawrm ]
/ ˈproʊ toʊˌfɔrm /

noun Linguistics.

a hypothetical linguistic form reconstructed as an element of a protolanguage.

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Did you ever collect all those state quarters? Put them to good use on this quiz about curious state monikers and the facts around them.
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Origin of proto-form

First recorded in 1960–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020