Lower-case
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Pertaining to, or kept in, the lower case; -- used to denotethe small letters, in distinction from capitals and small capitals.See the Note under 1st Case, n., 3.
Lower-case meaning & definition 1 of Lower-case.
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letters of the alphabet that are not written as capital letters, for example a, b,
Lower-case meaning & definition 2 of Lower-case.