Search Result：big-bang theory
big-bang theory 
(TTS Sound)
(TTS Sound)Overview of noun big-bang_theory
The noun big-bang theory has 1 sense
- big-bang theory, big bang theory -- ((cosmology) the theory that the universe originated sometime between 10 billion and 20 billion years ago from the cataclysmic explosion of a small volume of matter at extremely high density and temperature)