Adjective
non-restrictive (not comparable)
Alternative form of nonrestrictive.
British English, by contrast, generally does not require its writers to construct sentences in a manner that distinguishes between the restrictive and non-restrictive forms of modifiers. Source: Internet
In particular, a non-restrictive modifying phrase must be set off by commas, and it generally uses "which" as its pronoun. Source: Internet
In that sentence the phrase "which bit the man" is non-restrictive: it is merely providing background information about a dog whose identity is otherwise not in question. Source: Internet
Unit symbols such as kg and Hz are never punctuated. citation Restrictive and non-restrictive modifiers In American English, restrictive and non-restrictive modifying phrases require different words and sentence structures. Source: Internet