The term Texas Oil Center is composed of two words, 'Texas' and 'Oil Center'. The first word, 'Texas', is a state in the United States located in the south-central part of the country. It is the second largest state in the US by both area and population. The second word, 'Oil Center', refers to the city of Odessa, which is located in the state of Texas. Odessa is known for its oil industry and is home to many oil refineries and drilling companies.