The word D-loop refers to a type of structure formed when a DNA strand is replicated. This structure is important for various biological processes, such as DNA repair and transcription. Synonyms for D-loop include displacement loop, hinge loop, and loop structure. These terms refer to the same structure that is formed when a single strand of DNA is displaced and forms a loop with a complementary strand. Understanding the various synonyms for D-loop can help researchers and students better discuss and understand the biology behind DNA replication and related processes.