Definitions

1. noun

A diaphragm, especially a thin, flexible plate used in a machine or instrument, such as a pump or a musical instrument.

“The metaphragm of the steam engine played a crucial role in regulating the pressure.”

2. noun

A diaphragm or similar structure in the anatomy of certain animals, especially a thin, muscular partition in the body of an insect or an arthropod.

“The metaphragm in the insect’s body separated its thorax from its abdomen.”