Emily Dickinson Lexicon

CLEP'SY-DRA, n. [L. from Gr. κλεψυδρα; κλεπτω, to steal, to hide, and ὑδωρ, water.]

1. A time-piece used by the Greeks and Romans, which measured time by the discharge of a certain quantity of water. Also, a fountain in Greece.
2. A chimical vessel.