waste-holen. a hole for the discharge of superfluous water.
ΘΚΠ
the world > space > relative position > condition of being open or not closed > an opening or aperture > [noun] > communicating with outside or air > for escape or discharge of something
vent1570
venting-hole1601
pigeonhole1683
waste-hole1839
porthole1858
port1944
1839 Civil Engineer & Architect's Jrnl.2 436/1 The same adjustment may be made by stopping the pump, and letting out the water from the waste-holes.