- harmonic pole
- harmonic polynomial
- harmonic position
- harmonic progression
- harmonic proportion
- harmonic quadrilateral
- harmonic quadruple
- harmonic quadruple of lines
- harmonic quadruple of planes
- harmonic quadruple of points
- harmonic range
- harmonic range of points
- harmonic ratio
- harmonic representative
- harmonic scalar field
- harmonic segment
- harmonic sequence
- harmonic series
- harmonic series of primes
- harmonic sheaf
- harmonic solution
- harmonic space
- harmonic spinor field
- harmonic subspace
- harmonic surface