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

• 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