Pronunciation: (ī'urn-sīd"), [key]
1. a strong person with great power of endurance or resistance.
2. (cap.) an epithet or nickname of Edmund II of England.
3. (cap.) Usually, Ironsides.
a. (used with a sing. v.) a nickname of Oliver Cromwell.
b. the soldiers serving under Cromwell.
4. ironsides, (usually used with a sing. v.)
a. an ironclad.
b. Eastern U.S.scup.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.