Definitions

from The Century Dictionary.

  • noun A thimble or annular plate used to reinforce a hole in a boiler.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Steam Boiler) An annular reënforce, to strengthen a place where a hole is made.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun An annular reinforcement in a steam boiler, to strengthen a place where a hole is made.

Etymologies

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