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Meaning of hydroaerobics

hy•dro•aer•o•bics

Pronunciation: (hī"drō-â-rō'biks), [key]
— n. (used with a plural verb)
  1. aerobic exercises performed in water, as in a swimming pool.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.