penstock (penstok)

[ By a series of bolts and adjustments, the penstocks can be fixed ready for use when the tide is highest in the sewer. Mayhew. London Labour and London Poor, II. 482. 3. The barrel of a pump, in which the piston plays, and through which the water pa es up. Gr. πέντε, five, + καρπός, fruit.] in bot., composed of five carpels. pentace (pen'tā-sē), n. [ pellucid-dotted leaves, and long much-branched axillary panicles of many small flowers. It is a tall evergreen, reaching 60 feet high, and known as the More ton Bay varnish-tree, or white cedar.