It is of utmost importance to understand what plagiarism is when attempting to provide the quintessential answer.
"Quintessential" is an adjective that describes the perfect example of a particular type, The quintessential quarterback would be one who has all of the traits and qualities those who are knowledgeable about football would expect from a quarterback. There are quintessential villains and heroes. It could be that "quintessential" is generally used to describe people, but that may not be necessarily true.
That photograph caught a quintessential moment in our nation's hsitory.
Beyond our solar system, the heavens are made up of only quintessential elements.
No the word quintessential is not a noun. It is an adjective.
Her comportment throughout the ordeal displayed a quintessential bravery.
Jacqueline Kennedy's poise, grace and class made her the quintessential first lady.
The quintessential ingredient in cake is flour.
by adjective in the sentence
NO but in the sentence "Use of the word "in" as an adjective is IN these days" the IN is an adjective
In a sentence.
An adjective describes a noun.
'He was a worried boy.' In this sentence worried is describing the boy, therefore worried is an adjective.