15-Letter Words Containing: E,F,F,E,I,R

• A device that uses diffraction (especially X-ray diffraction) to investigate the structure of matter.

• the quality of being frightful

• 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

• lose specialization in form or function

• a discrimination between things as different and distinct on the basis of their characteristics or attributes

• the mathematical process of obtaining the derivative of a function

• (biology) the structural adaptation of some body part for a particular function