14-Letter Words Containing: R,I,F,T,I,E,S,T

• the physical property of a medium as determined by its index of refraction

• the fraction of radiant energy that is reflected from a surface

• the ability to reflect beams or rays

• the capability of quiet thought or contemplation

• (chemistry) the process of refinement or purification of a substance by distillation

• the conversion of alternating current to direct current

• the act of offering an improvement to replace a mistake; setting right

• determination of the length of a curve; finding a straight line equal in length to a given curve

• mark as different

• be a distinctive feature, attribute, or trait; sometimes in a very positive sense

• calculate a derivative; take the derivative

• become different during development

• evolve so as to lead to a new species or develop in a way most suited to the environment

• become distinct and acquire a different character

• the act of certifying or bestowing a franchise on

• confirmation that some fact or statement is true through the use of documentary evidence

• a document attesting to the truth of certain stated facts

• validating the authenticity of something or someone

• a quarrel about petty points

• the process of turning some plant material into stone by infiltration with water carrying mineral particles without changing the original shape