hyperfine
1. [ adjective ] (physics) extremely fine or thin, as in a spectral line split into two or more components
Examples:

"hyperfine structure"

Related terms: physics thin
Similar spelling:   hyperpnea
  hyperborean
  hyperope
  hyperopic
  hyperopia
  hyperbole
  hyperpyrexia
  hyperpiesis
  hyperpiesia
  hyperbaton