WordReference Random House Unabridged Dictionary of American English © 2026
me•du•san
(mə do̅o̅′sən, -zən, -dyo̅o̅′-),USA pronunciation adj.
n.
- Invertebratespertaining to a medusa or jellyfish.
n.
- Invertebratesa medusa or jellyfish.
- medus(a) + -an 1840–50