Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

safety disk

noun

Definition of safety disk 

: a thin copper disk over the steam boiler end of an escape pipe designed to break and permit escape of steam under excessive pressure

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Learn More about safety disk

Share safety disk

Resources for safety disk

Cite Time Traveler Time Traveler! Explore the year a word first appeared

Dictionary Entries near safety disk

safety chain

safety curtain

safety-deposit

safety disk

safety dog

safety edge

safety explosive

Statistics for safety disk

Look-up Popularity

Comments on safety disk

What made you want to look up safety disk? Please tell us where you read or heard it (including the quote, if possible).

Show Comments  Hide Comments 

WORD OF THE DAY

tergiversation

evasion of direct action or statement

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play

Ask the Editors

Word Games