A doctorate is an academic degree that in most countries represents the highest level of formal study or research in a given field. In some countries it also refers to a class of degrees which qualify the holder to practice in a specific profession (such as law or medicine). The best-known example of the former is the PhD (Doctor of Philosophy), while examples of the latter include the U.S. degree of Doctor of Medicine and the Dutch Professional Doctorate in Engineering. In some countries, the highest degree in a given field is referred to as a terminal degree, although this is by no means universal (the phrase is not in general use in the U.K., for example), practice varies from country to country, and a distinction is sometimes made between terminal professional degrees (such as the J.D.) and terminal research degrees (such as the LL.D. or S.J.D.).
The term doctorate comes from the Latin docere, meaning "to teach", shortened from the full Latin title licentia docendi, meaning "license to teach." This is said to have been translated from the equivalent Arabic term ijazat attadris, which was a distinction granted to certain Islamic scholars, thus qualifying them to teach