doub - ecol
- double
- double achromatic lens
- double amplitude
- double arc
- double arrow
- double astrograph
- double beam
- double beta decay
- double black hole
- double bond
- double branching
- double calorimeter
- double charge
- double charge exchange
- double coincidence
- double Compton effect
- double concave
- double concave lens
- double condenser
- double cone
- double convex
- double convex lens
- double counter
- double counting
- double critical point
- double cross slip
- double decay
- double decomposition
- double differentiation
- double diffraction
- double diffraction dissociation
- double diffractive dissociation
- double diffusion
- double diode
- double discharge system
- double distribution
- double Doppler effect
- double edge crack
- double electric probe
- double electrical layer