Definitions

1. noun

A plate or disk of tissue at the base of a hydrostatic organ, such as a statocyst or an otolith organ, that helps in maintaining balance and spatial orientation.

“The rostellum of the statocyst played a crucial role in the fish’s ability to navigate through the water.”

2. noun

A plate-like structure in a snail’s radula used to scrape and grind food.

“The snail’s rostellum was covered in tiny teeth that helped it to break down the tough plant material.”