Emily Dickinson Lexicon

DEC'IM-AL, a. [L. decimus, tenth, from decem, ten; Gr. δεκα; Goth. tig, ten, Sax. a tie.]

1. Numbered by ten; as, decimal progression. – Locke.
2. Increasing or diminishing by ten; as, decimal numbers; decimal arithmetic; decimal fractions.
3. Tenth; as a decimal part.