Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

fissionable

play
adjective fis·sion·able \ˈfi-shə-nə-bəl, -zhə-; ˈfish-nə-, ˈfizh-\

Definition of fissionable

  1. :  fissile 2

fis·sion·abil·i·ty play \ˌfi-shə-nə-ˈbi-lə-tē, -zhə-; ˌfish-nə-, ˌfizh-\ noun


1945

First Known Use of fissionable

1945


Medical Dictionary

fissionable

play play
adjective fis·sion·able \ˈfish-(ə-)nə-bəl, ˈfizh-\

Medical Definition of fissionable

  1. :  capable of undergoing fission and especially atomic fission




Learn More about fissionable

  1. Medical Dictionary: Definition of "fissionable"


Seen and Heard

What made you want to look up fissionable? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 10, 2016

to put in good humor

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

duvet spindrift kittly-benders pince-nez
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ