Physics. the amount of a given fissionable material necessary to sustain a chain reaction at a constant rate.
an amount necessary or sufficient to have a significant effect or to achieve a result:
a critical mass of popular support.
the minimum mass of fissionable material that can sustain a nuclear chain reaction
the minimum amount of money or number of people required to start or sustain an operation, business, process, etc: the critical mass for a subscription digital sports channel
In physics, the amount of material that must be present before a chain reaction can sustain itself.
Note: The term critical mass is used to refer generally to the minimum amount of something needed to produce a given effect: “The town needs a critical mass of industry to attract more business.”
[krit-i-kuh l] /ˈkrɪt ɪ kəl/ adjective 1. inclined to find fault or to judge with severity, often too readily. 2. occupied with or skilled in criticism. 3. involving skillful judgment as to truth, merit, etc.; judicial: a critical analysis. 4. of or relating to critics or criticism: critical essays. 5. providing textual variants, proposed emendations, […]
- Critical organ
critical organ n. The organ or physiological system that would first be subjected to radiation in excess of the maximum permissible amount as the dose of a radioactive material is increased.
- Critical path
noun the necessary path or sequence from start to finish, determining the time needed for completion; the longest most time-consuming path in a network
- Critical period
noun 1. (psychol) a period in a lifetime during which a specific stage of development usually occurs. If it fails to do so, it cannot readily occur afterwards noun a time in a person’s development in which a certain skill or characterized would be most readily acquired Usage Note psychology