Pēn'-stōck, n.

n. 1. [Probably from Eng. pen, that is, quill, and stock, the water often being discharged through a quill or other small pipe, or, possibly, from Fr. pente, inclination, slope, and Eng. stock. Cf. PENTHOUSE.] A close trough or tube of planks for conducting water, as to a water-wheel, or for emptying a pond, or for domestic uses.

2. The barrel of a wooden pump.
3. The handle used with a metallic or other pen.