fragment

A sentence fragment is a single word or a group of words that does not qualify as a complete grammatical sentence. It might be a dependent clause written as a complete sentence. Or it might simply be a group of words with no verb at all. Many writers effectively use sentence fragments in their style. Fragments might also be called typographical sentences, a group of words beginning with a capital letter and ending with a period. If you use typographical sentences in your style, make certain it is immediately evident that you know what you're doing and that you're not making a mistake. And point out to your supervisor that great writers often use these structures. So there.