gluteus

The word 'gluteus' is a direct borrowing from the Modern Latin anatomical term 'gluteus', which itself is derived from the Greek 'gloutos', meaning 'buttock' or 'rump'. The Latin suffix '-eus' was added to form an adjective, a common practice in scientific Latin to name muscles based on their location. Thus, the term literally means 'pertaining to the buttock'. In modern anatomical terminology, it is used as a noun to specifically designate the major muscles (gluteus maximus, medius, and minimus) that form the fleshy part of the buttocks.

Structure: glut (buttock) + eus (adjective-forming suffix) glut (from Greek gloutos, meaning 'buttock' or 'rump') + eus (a Latin adjectival suffix meaning 'pertaining to' or 'of the nature of')