difference equationdifferentdifferent as chalk and cheesedifferent kinds of fooddifferentiadifferentiabledifferentialdifferential amplifierdifferential analyzerdifferential calculusdifferential calulusdifferential coefficientdifferential compactiondifferential equationdifferential geardifferential stagedifferential windlassdifferentiatedifferentiateddifferentiationdifferentiatordifferentlydifficiledifficultdifficultydiffidencediffidentdiffidentlydiffractdiffractiondiffraction gratingdiffractometerdiffractometrydiffractor ndiffusediffuseddiffuselydiffusenessdiffuserdiffuser or diffusordiffusiblediffusiondiffusion coefficientdiffusion of lightdiffusivediffusivelydiffusivenessdiffusivitydiffusordificiency
