plural of displacement speed.

(nautical) hull speed

(electromagnetism) The direction and rate of change of the electric displacement field at a given point of space and time. It can be expressed as a vector.

plural of displacement activity

A pump which operates by periodically changing the volume of a cavity

plural of positive displacement pump

A refugee, especially of war or of forced migration.

plural of displaced person

plural of displaced person

(Canada, US) A woman who no longer has a reliable source of income from her husband, as a result of divorce, widowhood, disability, etc.