a·quat·ic (ə-kwătĭk, ə-kwŏt-)
1. Consisting of, relating to, or being in water: an aquatic environment.
2. Living solely or chiefly in or on the water: aquatic animals and plants.
3. Taking place in or on the water: an aquatic sport.
1. An organism that lives solely or chiefly in or on the water.
2. aquatics Sports Athletic activities performed in or on the water.
[Middle English aquatique, from Old French, from Latin aquāticus, from aqua, water; see akw-ā- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.