15-Letter Words Containing: A,Y,A,T,S

• extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds

• regarding something abstract as a material thing

• with respect to the sympathetic nervous system

• in a sympathetic manner

• the formation of crystals

• a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces

• a mental synthesis that becomes fixed or concrete by a process resembling crystal formation

• the branch of science that studies the formation and structure of crystals

• systematic organization; the act of organizing something according to a system or a rationale