fission

Borrowed from Latin fissiōnem, accusative singular of fissiō (“the act of breaking up”), from findō (“split, divide”).

• enPR: fĭ'shən, fĭ'zhən, IPA^(key): /ˈfɪʃən/, /ˈfɪʒən/
• Rhymes: -ɪʃən, -ɪʒən

fission (countable and uncountable, plural fissions)

1. The process whereby one item splits to become two.
2. (physics) The process of splitting the nucleus of an atom into smaller particles; nuclear fission
3. (biology) The process by which a bacterium splits to form two daughter cells.

• (process of splitting the nucleus of an atom): fusion

fission (third-person singular simple present fissions, present participle fissioning, simple past and past participle fissioned)

1. (transitive) To cause to undergo fission.
2. (intransitive) To undergo fission.

fission

1. Genitive singular form of fissio.

Borrowed from Latin fissiō, fissiōnem.

• IPA^(key): /fi.sjɔ̃/

fission f (plural fissions)

1. (chiefly physics) fission

• “fission” in le Trésor de la langue française informatisé (The Digitized Treasury of the French Language).