critical mass

• الحد الأدنى من الكمية أو الحجم اللازم لبدء تأثير أو عملية أو تفاعل متسلسل واستمرارهما. مصطلح فيزيائي نووي في الأصل، ويُستخدم الآن على نطاق واسع في الأعمال والتقنية والسياقات الاجتماعية.

The minimum amount or size of something required to start or sustain a significant effect, process, or chain reaction. Originally a nuclear physics term, now widely used in business, technology, and social contexts.

1. Nuclear physicsC1formal

   The minimum amount of fissile material needed to sustain a nuclear chain reaction.

   الكتلة الحرجة

   • The scientists carefully calculated the critical mass for the reactor.
   • Reaching critical mass is essential for a nuclear explosion.
   • The experiment required a precise amount of uranium to achieve critical mass.

2. Sufficient quantityB2formal

   The minimum amount or number of something required to start or sustain a process or movement.

   الكتلة الحرجة

   • The campaign needs to reach a critical mass of supporters to be effective.
   • Once the company achieved critical mass, its growth accelerated rapidly.
   • The movement gained critical mass after the public protest.