12-Letter Words Containing: _,A,C,I,R,S,S,T

• cause to take on a definite and clear shape

• make free from confusion or ambiguity; make clear

• cause to form crystals or assume crystalline form

• assume crystalline form; become crystallized

• Any solid with conventional crystalline properties but exhibiting a point group symmetry inconsistent with translational periodicity

• a substance added to plastics or other materials to make them more pliable

• a watch that is worn strapped to the wrist

• telephone central where circuits are completed with patchcords

• any of several marine reptiles of the Mesozoic having a body like a porpoise with dorsal and tail fins and paddle-shaped limbs

• a physician who specializes in psychiatry

• the branch of astronomy concerned with the physical and chemical properties of celestial bodies

• the branch of medicine dealing with the diagnosis and treatment of mental disorders

• a crackling or hissing noise caused by electrical interference