Step-by-step explanation:
Yes, the medical term "myelofibrosis" does have a combining vowel. The combining vowel "o" is used to connect the word roots "myelo-" (related to the bone marrow) and "fibro-" (related to fibrous tissue), making it easier to pronounce and understand the term. In medical terminology, combining vowels are often used to improve the flow and pronunciation of complex words.