"د." is an abbreviation commonly used in Arabic-speaking countries to denote "Doctor" or "Doctorate." It is often placed before a person's name to indicate their academic qualifications, particularly in fields such as medicine, education, or research. The title signifies a high level of expertise and is respected in various professional settings. In addition to its use in academic contexts, "د." can also refer to individuals who have earned a PhD or a medical degree. This title is important in establishing credibility and authority in discussions related to health, science, and education.