"determinative role" is a correct and usable phrase in written English.
It is used to describe something that is the deciding factor in something or someone playing a decisive role in a situation. For example, "The new governor has played a determinative role in implementing the new policy."
Their importance -- no, their determinative role -- is too obvious to deny.
Moreover, existence or absence of cellulose-binding domain might play a determinative role.
Like it or not, flyover country will continue to play an outsized and determinative role in presidential elections.
Experiments showed that the amount of indium trichloride played a determinative role in the final morphology of the products.
Among these PVT properties, some have a determinative role in gas and oil equilibrium in the hydrocarbon reservoirs.
Nor does it seem that Justice Alito would play a determinative role in such a case in any event, given what is known about the other justices' views.
Polling suggests that the attitudes represented by Berg and Lonkart played determinative roles in Trump's victory last month.
played determinative roles.
Since VEGF promotes lymphangiogenesis and angiogenesis in the primary tumor, thereby paving the way for metastasis, these findings suggest that HIF-1α plays a determinative direct role in the processs of colorectal cancer metastasis.
But its reticence on the uneven nature of American progress is strikingly naive and delusional, especially given the overwhelming--though not singularly determinative--role that African-Americans played in supporting Prop 8 and denying other Americans their civil rights.
In deciding whether to grant a preliminary injunction, the Court's initial estimation of the strength of the plaintiff's case plays a role, but it is not determinative.
