Definitions

1. noun

An extinct genus of sea turtles that lived during the Late Cretaceous period.

“Fossil records reveal that the protostega was a significant species in prehistoric marine ecosystems.”

2. proper noun

A genus of sea turtles, specifically referring to Protostega, a genus of extinct sea turtles.

“The discovery of the protostega fossils has provided valuable insights into the evolution of sea turtles.”