term:

Unitary

unitary adj

1 : having the character of a single thing that is a constituent of a whole
;specif
: of, relating to, or being a business with subsidiaries in other states or nations that has its state income tax figured by including the subsidiaries' income, determining the portion of that income attributable to activities within the state, and taxing that percentage [a business operating throughout the U.S.] [imposed a tax on a multinational corporation]
2 : marked by unity
: not dual or segregated
: integrated [a school district]
uni·tar·i·ness n

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.