The word "Iletin" is a trademarked name for insulin that was first trademarked in 1923 by the pharmaceutical company Eli Lilly and Company. The spelling of "Iletin" is based on the pronunciation of the word insulin, which is pronounced as /ˈɪnsəlɪn/ in IPA phonetic transcription. The first syllable of insulin is pronounced as "il" which is how "Iletin" got its name. While the use of the term Iletin has largely fallen out of use, it played a crucial role in the development of insulin therapy for diabetes.
The word "Iletin" is derived from the combination of two words - "islets" and "insulin".
Islets refer to the islets of Langerhans, which are tiny clusters of cells located in the pancreas. These islets contain different types of cells, including beta cells, which produce and secrete the hormone insulin. Insulin, on the other hand, is a critical hormone involved in regulating blood sugar levels.
The word "Iletin" was coined by combining the first four letters of "islets" with the last four letters of "insulin". It was initially used to refer to a commercial preparation of insulin extracted from the pancreas of animals, primarily from pigs and cows. This term was commonly used before the development of synthetic insulin.