King's Pawn Game

(chess) A half-open file.

(chess) A file with only pawns of one color on it.

plural of semi-open file

plural of half-open file

(engineering, thermodynamics) A feedwater heater in which the two fluid streams mix together.

plural of open feedwater heater

The difference of electrical potential between two terminals of a device when disconnected from any circuit. The open-circuit voltage of a cell is its EMF (electromotive force).

plural of open reading frame

plural of double open jaw