Definitions

1. noun

A marine crustacean of the class Maxillopoda, typically having a peduncle attached to a stationary base and being attached to a substratum by a stalk-like structure.

“The diver noticed a cluster of cirripedes clinging to the rocky surface of the ocean floor.”

2. noun

A barnacle.

“The sailor struggled to remove the cirripede that had attached itself to the hull of the ship.”