capital letter

upper-case letter used to begin a sentence or proper name (A, B, C, etc.)

upper-case letters used to begin a sentence or proper name (A, B, C, etc.)

Capital letters or majuscules (in the Roman alphabet: A, B, C, D, ...) are one type of case in a writing system. Capital letters (also simply called capitals or caps) are also known as upper case; manual typesetters kept them in the upper drawers of a desk, keeping the more frequently used minuscule letters on the lower shelf. This practice may date back to Johann Gutenberg.
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Noun
1. one of the large alphabetic characters used as the first letter in writing or printing proper names and sometimes for emphasis; "printers once kept the type for capitals and for small letters in separate cases; capitals were kept in the upper half of the type case and so became known as upper-case letters"
(synonym) capital, upper case, upper-case letter, majuscule
(hypernym) character, grapheme, graphic symbol
(hyponym) small capital, small cap