Inter-genic region refers to the DNA sequence between two genes on a chromosome, and it plays a crucial role in genetic regulation and evolution. There are several synonyms for this term, including non-coding DNA, intergenic space, intergenic segment, and inter-cistronic region. These terms refer to the same sequence of DNA that does not encode for protein and is located between two genes. Some researchers also use the term "intergenic spacer" or "intergenic region" interchangeably. Understanding the functions of these intergenic regions is essential for understanding gene expression, gene regulation, and genetic evolution. Scientists are continuously studying and exploring these regions for their potential to uncover new insights into genetic diversity and evolution.