fragment

/ˈfɹæɡmənt/

A part broken off; a small, detached portion; an imperfect part, either physically or not

I heard a small fragment of the conversation.

(grammar) A sentence not containing a subject or a predicate.

An incomplete portion of code.

A portion of a URL referring to a subordinate resource (such as a specific point on a web page), introduced by the # sign.