2 Answers

Mi•nus•cule (?m?n ??skyul, m??n?s kyul)

adj.
1. very small.
2. (of letters or writing) small; not capital.
3. written in such letters (opposed to majuscule).
n.
4. a minuscule letter.
5. a small cursive script developed in the 7th century A.D. from the uncial, which it afterward superseded.
[1695–1705; < Latin minusculus smallish. See minus, -cule1]
mi•nus′cu•lar, adj.
usage: minuscule, from Latin minus meaning “less,” has frequently come to be spelled miniscule, probably under the influence of the prefix mini- in the sense “of a small size.” Though this spelling occurs frequently in edited writing, it is usually considered an error.

Wiki answer.

tiny, tiny as pinhead, speck of something barely visible