n :  an instrument that utilizes the interference of waves (as of light) for precise determination esp. of wavelength, spectral fine structure, indices of refraction, and very small linear displacements in*ter*fer*o*met*ric adj in*ter*fer*o*met*ri*cal*ly adv in*ter*fer*om*e*try n pl  -tries  
 
   
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2024.