Someone who is forced to flee his or her home but who remains within his or her country's borders. Abbreviated as IDP.

(optics, uncountable) A phenomenon where light, instead of passing into a medium of a lower refractive index and refracting away from the normal, is completely reflected by the boundary between the two media because it approaches at an angle greater than or equal to the critical angle.

(optics) total internal reflection

plural of total internal reflection

plural of complete internal reflection

plural of total internal reflexion

Alternative form of total internal reflection

(finance, US) The domestic portion of federal statutory tax law in the United States.

plural of internal combustion engine

plural of internally displaced person