fluo - freq
- four-component neutrino
- four-component spinor
- four-critical point
- four-dimensional
- four-dimensional axial vector
- four-dimensional calculation
- four-dimensional continuum
- four-dimensional current
- four-dimensional geodesy
- four-dimensional gradient
- four-dimensional heterotic string
- four-dimensional interval
- four-dimensional momentum
- four-dimensional Paterson function
- four-dimensional path
- four-dimensional potential
- four-dimensional Riemann geometry
- four-dimensional space
- four-dimensional space-time
- four-dimensional symmetry
- four-dimensional Universe
- four-dimensional vector
- four-dimensional vector-potential
- four-dimensional velocity
- four-dimensionality
- four-fermion coupling
- four-fermion interaction
- four-fermion operator
- four-fold coincidence
- four-fold degeneracy
- four-gluon vertex
- four-jet event
- four-level laser
- four-level liquid
- four-level maser
- four-level system
- four-loop diagram
- four-mirror ring resonator
- four-nucleon structure
- four-particle amplitude