Determitive
adjective Able or serving to determine: synonym: decisive.
noun A determining factor.
from The Century Dictionary.
Having power to determine, fix, or decide; tending or serving to shape or direct; conclusive.
Of use in ascertaining the species; serving to determine the precise kind of a thing: as, determinative tables in the natural sciences (that is, tables arranged for determining the specific character of minerals, plants, etc., and to assist in assigning them to their species); determinative signs in hieroglyphics; determinative ornaments or structures.
noun That which determines or indicates the character or quality of something else.
noun In grammar, a determinative or demonstrative word.
from the GNU version of the Collaborative International Dictionary of English.
adjective Having power to determine; limiting; shaping; directing; conclusive.
adjective (Nat. Hist.) tables presenting the specific character of minerals, plants, etc., to assist in determining the species to which a specimen belongs.
noun That which serves to determine.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
noun linguistics An ideogram used to mark semantic categories of words in logographic scripts.
adjective Determining (deciding) something.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective having the power or quality of deciding
noun a determining or causal element or factor
noun one of a limited class of noun modifiers that determine the referents of noun phrases