n pl but sing or pl in constr :  a science that deals with matter and energy and their interactions in the fields of mechanics, acoustics, optics, heat, electricity, magnetism, radiation, atomic structure, and nuclear phenomena .
 
 
 
Similar sounding terms:  vis·cous  vis·cus 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2004.