Any of the Pinnidae, a family of large saltwater clams.

A ballpoint pen.

plural of pen-pusher

plural of pen pusher

(aviation, military) A specially constructed E-shaped double bay to protect aircraft against bomb blasts and splinters during enemy attacks.

A specialized ink pen with a cylindrical point used by an engineer, architect, or drafter to make lines of constant width for architectural, engineering, or technical drawings.

Alternative form of keelyvine pen

To enclose (animals) in a pen / To enclose as if in a pen

plural of pen-name

plural of pen friend