名詞 fission:

1. a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy
   同義詞：nuclear fission
2. reproduction of some unicellular organisms by division of the cell into two more or less equal parts

1. A substance, such as water or graphite, that is used in a nuclear reactor to decrease the speed of fast neutrons and increase the likelihood of fission.
   慢化劑一種物質(zhì)，如水或石墨在核反應(yīng)堆中用來(lái)減緩中子運(yùn)動(dòng)速度和提高裂變可能性的物質(zhì)

fis.sion

n.（名詞）
The act or process of splitting into parts.
分裂，裂開：裂成幾個(gè)部分的行動(dòng)或過(guò)程
A nuclear reaction in which an atomic nucleus, especially a heavy nucleus such as an isotope of uranium, splits into fragments, usually two fragments of comparable mass, with the evolution of from 00 million to several hundred million electron volts of energy.
裂變：一種如鈾的同位素等重核的原子核核反應(yīng)，通常分裂成兩個(gè)質(zhì)量相近的碎片并能釋放出00萬(wàn)到幾百萬(wàn)電子伏的能量
Biology An asexual reproductive process in which a unicellular organism divides into two or more independently maturing daughter cells.
【生物學(xué)】 裂殖，分裂生殖：?jiǎn)渭?xì)胞組織分裂成兩個(gè)或多個(gè)獨(dú)立的成熟子細(xì)胞的無(wú)性生殖過(guò)程

來(lái)源：
Latin fissiô fissiôn- [a cleaving]
拉丁語(yǔ) fissiô fissiôn- [分裂]
from fissus [split] * see fissi-
源自 fissus [裂開] *參見 fissi-