stirrup iron

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A stirrup.

Century Dictionary and Cyclopedia

1. n. The stirrup proper—that is, the metal loop in which the foot is placed, as distinguished from the leather strap which suspends it.
2. n. An iron strip to hold the end of a beam or girder.

GNU Webster's 1913

1. n. an iron stirrup.

WordNet 3.0

1. n. support consisting of metal loops into which rider's feet go