The combining form micr/o denotes which meaning?

• A. Large
• B. Small
• C. Medium
• D. Tiny

Answer: (B)

Understanding how combining forms convey size in medical terms. The combining form micr/o means small, coming from the Greek mikros. It's the piece you attach to other word parts to indicate that something is small, as in microscope (device for viewing small things), microorganism (a tiny organism), or microbiology (the study of small life forms). That clear link to small size is why this is the best interpretation. Other size indicators exist: macro- signals large, meso- denotes middle, and while “tiny” is a casual way to describe small, medical terminology uses the precise meaning small conveyed by micr/o. So micr/o specifically expresses small in term formation.