isop - knee
- isoperimetric
- isosceles
- isosceles triangle
- isospin
- isothermal
- isothermal atmosphere
- isothermal expansion
- isothermal line
- isothermal process
- isothermal surface
- isotonic
- isotonic solution
- isotope
- isotope separation
- isotopic
- isotopic composition
- isotopic exchange
- isotopic ratio
- isotopic spin
- isotopy
- isotopy invariant
- isotropic
- isotropic antenna
- isotropic dielectric
- isotropic distribution
- isotropic material
- isotropic medium
- isotropic radiator
- isotropic scattering
- isotropic space
- isotropic substance
- isotropic turbulence
- isotropy
- Israel
- Israeli
- issuance
- issue
- issue a law
- issue a receipt
- issue bonds
