Minuscule
Part of speech: noun
Definition: A lower-case letter. Any of the two medieval handwriting styles minuscule cursive and Caroline minuscule. A letter in these styles.
Part of speech: adjective
Definition: Written in minuscules, lower-case. Written in minuscule handwriting style. Very small, tiny.
Lowercase
Part of speech: adjective
Definition: in lower case
Part of speech: noun
Definition: The minuscule or small letters (a, b, c, as opposed to the uppercase or capital letters, A, B, C).