noun
or trunk plunger
: an elongated hollow piston in a single-acting engine or pump which is open at the end and in which the end of the connecting rod is pivoted
noun
or trunk plunger
: an elongated hollow piston in a single-acting engine or pump which is open at the end and in which the end of the connecting rod is pivoted
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012