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The minimum amount of fissile material needed to maintain a nuclear chain reaction.
- ‘Its main task is the enrichment of uranium, which provides critical mass in nuclear devices.’
- ‘As the seventh bucket was poured in the mixture reached critical mass initiating a sustained chain reaction.’
- ‘Such explosions are caused by the accumulation of a critical mass of material falling onto the neutron star from a partner.’
- ‘Its basic principle is assembling a critical mass of a radioactive element with properties to spark a swift chain reaction.’
- ‘Just two months earlier, the Observer published internal documents indicating that there had been eight breaches of safety rules intended to prevent critical masses of fissile material being brought together.’
2The minimum size or amount of resources required to start or maintain a venture.‘some of our new industries are now reaching critical mass’
- ‘That means that once they reach critical mass, their profit margins fatten as revenues grow.’
- ‘It's been a long time coming, but it seems like the British blogging scene is finally starting to reach critical mass.’
- ‘The shorter the time you need to reach that critical mass of users, the sooner your site pays off.’
- ‘Taken together, the surveys point to the need for critical masses to be present in order for development to proceed.’
- ‘The multicultural marketplace has reached critical mass, and it requires a new approach.’
- ‘But until the market reaches a critical mass, dealers have to turn to other revenue streams to keep going.’
- ‘To reach a critical mass, we need to take a stand, and we need to awaken our neighbours, our parents, our friends.’
- ‘It has a roadmap to integrate these to produce something cheaper and smaller, but that first requires a critical mass to justify the investment of course.’
- ‘There's a lot of good stuff, but it just hasn't reached a critical mass where it will establish itself in the marketplace.’
- ‘We had to dominate the top markets to create a critical mass for marketing and achieve economies of scale in advertising.’
- ‘Only then did it make the transition from great technology to great technology with a critical mass of users.’
- ‘Some of our new industries are now reaching critical mass - big enough to matter in the real world.’
- ‘Any good movement requires a critical mass.’
- ‘Stephens said the company is talking to a number of larger domain name registrars about using their services as a channel to reach the required critical mass of customers.’
- ‘As long as you have less than the critical mass of material, nothing happens.’
- ‘Some technologies reach a critical mass of adoption in a short period of time and are great market successes.’
- ‘This is even more reason to ensure we create a critical mass in the market place.’
- ‘Have you reached a critical mass that creates a marketing momentum of its own?’
- ‘Perhaps a piecemeal approach prevents many interventions from reaching the required critical mass.’
- ‘Until it reaches the critical mass it's aiming for, it won't take the risk of participating in government down here.’
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