noun
dynamo theory
Scientific term in geophysics and astrophysics describing how a rotating, convecting, and electrically conducting fluid can maintain a magnetic field over astronomical time scales.
地球磁場の起源はダイナモ理論で説明される。
The origin of the Earth's magnetic field is explained by dynamo theory.
From English 'dynamo theory'. The term is a direct loanword compound used in scientific contexts.