Definitions

1. adjective

relating to or characteristic of an estuary, especially in its physical or ecological features.

“The estuarial waters of the bay are home to a diverse array of marine life.”

2. noun

a coastal area where freshwater from a river or stream meets the saltwater of the sea, especially where the mixture of the two creates a unique ecosystem.

“The estuarial ecosystem is a delicate balance of fresh and saltwater habitats.”