CRITICAL MASS meaning: Minimum amount needed for reaction

We found 35 dictionaries that define the word critical mass:

General (18 matching dictionaries)

critical mass: Merriam-Webster
critical mass: Oxford Learner's Dictionaries
critical mass: American Heritage Dictionary of the English Language
critical mass: Collins English Dictionary
critical mass: Vocabulary.com
critical mass: Cambridge Advanced Learner's Dictionary
Critical Mass, critical mass: Wiktionary
critical mass: The Wordsmyth English Dictionary-Thesaurus
critical mass: Infoplease Dictionary
critical mass: Dictionary.com
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critical mass: Rhymezone
critical mass: FreeDictionary.org
critical mass: Mnemonic Dictionary
critical mass: TheFreeDictionary.com
critical mass: Longman Dictionary of Contemporary English

Business (5 matching dictionaries)

INVESTORWORDS (No longer online)
BuzzWhack (No longer online)
eyefortransport e-commerce transportation glossary (No longer online)
Critical Mass: Investopedia
BusinessDictionary.com (No longer online)

Computing (3 matching dictionaries)

critical mass: Free On-line Dictionary of Computing
critical mass: Netlingo
Critical Mass (bicycle), Critical Mass (cycling), Critical mass (nuclear), critical mass: Encyclopedia

Medicine (2 matching dictionaries)

online medical dictionary (No longer online)
critical mass: Medical dictionary

Science (3 matching dictionaries)

Chemistry Dictionary (No longer online)
Critical Mass: Eric Weisstein's World of Physics
Critical mass: NRC Glossary of Nuclear Terms --

Slang (1 matching dictionary)

critical mass: Urban Dictionary

Tech (3 matching dictionaries)

DOD Dictionary of Military Terms (No longer online)
Explosives (No longer online)
Nuclear Terms (No longer online)

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Definitions from Wiktionary (Critical Mass)

▸ noun:  (nuclear physics) The minimum amount of fissile material needed to support a self-sustaining nuclear chain reaction.
▸ noun:  (by extension, figurative) The minimum amount of something or the minimum number of people needed to trigger a phenomenon.
▸ noun:  A direct action event in which bicycle riders travel through city streets as a group.

Opposite:

insufficient, inadequate, insufficient mass

Types:

supercritical mass, more...

Adjectives:

core, loft, weapons-grade, nuclear, radioactive, dirty, electrovalent, self-sustaining, purum, molecular, electronegative

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