The phrase "a definitive part of" is correct and can be used in written English.
It is often used to describe a crucial or essential component of something. Example: The introduction is a definitive part of any academic paper, as it sets the tone for the rest of the writing and provides important background information.
The definitive part of the long creation story evidently began with the primitive Homo habilis (or a species closely related to it) two million years ago.
The last and most definitive parts of this book take Mr. Hohn to the apparent heart of darkness of his story: up through the Bering Strait and across the Northwest Territories.
There are still those patients which suffered a very heavy pressure of the environment, which may have a more definitive part in the establishment of the disease than genetics [ 6].
His education, although not definitive, was an integral part of his evolution from a bedroom producer to adding a plethora of tour dates into his iCalendar.
The side effects of full axillary dissection are common and all women should be warned of them prior to surgery; however they are usually mild and therefore should not preclude this procedure as a part of definitive surgical treatment.
Further work is needed to determine whether this may reflect a definitive choice on the part of family practitioners or be the result of a lack of dissemination or awareness of current evidence or teaching of sport and exercise medicine in England [ 21].
It is also of note that no participant received a definitive diagnosis of hypertension as a result of taking part in this study.
He also said that more footage would be released upon completion of an independent inquiry being conducted by the State Bureau of Investigation "and there has been a definitive decision on the part of the prosecutor".
But it is worth recalling the old sights and sounds and smells of Washington Street as a reminder that in New York — a city as densely layered as baklava — no one has a definitive claim on any part of town, and history can turn up some unexpected people in surprising places.
Patients undergo abdomino-pelvic surgery as a part of the definitive treatment of the disease and the mainstay of systemic treatment is platinum-based chemotherapy.
