English Vocabulary Dictionary | Word Meanings, Definitions & Examples
CEFR Level
an establishment that maintains a collection of wild animals for study, conservation, or display to the public
"We visited the zoo to see the lions and elephants."
Microscopic aquatic animals that drift in water bodies and form an essential part of the aquatic food chain, serving as food for fish and other marine organisms.
"Zooplankton plays an important role in the aquatic food chain."