The combining form for intestine is:

• A. Enter/o, intestin/o
• B. Ili/o
• C. Obstetr/o
• D. Myel/o

Answer: (A)

Combining forms are the building blocks used to connect roots with suffixes in medical terms. For the intestine, two common forms exist: enter/o and intestin/o. Enter/o comes from Greek and appears in terms like enteritis (inflammation of the intestine) and enterology (the study of the intestine). Intestin/o comes from Latin and shows up in words like intestinal (relating to the intestine). The other options point to different structures or fields—ili/o refers to the ilium bone, obstetr/o to pregnancy/childbirth, and myel/o to the spinal cord or bone marrow—so they don’t pertain to the intestine.