The Collaborative International Dictionary
Sinking pump
Sinking \Sink"ing\, a. & n. from Sink.
Sinking fund. See under Fund.
Sinking head (Founding), a riser from which the mold is fed as the casting shrinks. See Riser, n., 4.
Sinking pump, a pump which can be lowered in a well or a mine shaft as the level of the water sinks.