| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024fis•sion /ˈfɪʃən/USA pronunciation n. [uncountable]- Physicsthe splitting of the nucleus of an atom into nuclei of lighter atoms, accompanied by the release of energy.
- Developmental Biologythe division of a biological organism into new organisms as a process of reproduction.
WordReference Random House Unabridged Dictionary of American English © 2024fis•sion (fish′ən),USA pronunciation n. - the act of cleaving or splitting into parts.
- PhysicsAlso called nuclear fission. the splitting of the nucleus of an atom into nuclei of lighter atoms, accompanied by the release of energy. Cf. fusion (def. 4).
- Developmental Biology[Biol.]the division of an organism into new organisms as a process of reproduction.
v.i. - Physicsto undergo fission.
v.t. - [Physics.]to cause to undergo fission.
- Latin fissiōn- (stem of fissiō) a splitting, dividing, equivalent. to fiss(us) divided (see fissi-) + -iōn- -ion
- 1835–45
Collins Concise English Dictionary © HarperCollins Publishers:: fission /ˈfɪʃən/ n - the act or process of splitting or breaking into parts
- a form of asexual reproduction in single-celled animals and plants involving a division into two or more equal parts that develop into new cells
- short for nuclear fission
Etymology: 19th Century: from Latin fissiō a cleaving |