What does the suffix "-cele" refer to?

The suffix "-cele" is derived from the Greek word "kele," which means a protrusion or hernia, particularly a swelling or tumor. In medical terminology, it is commonly used to describe a pathological condition involving swelling or an abnormal protrusion of a tissue or an organ. For example, terms like "hydrocele" (a fluid-filled sac around a testicle) or "meningocele" (a type of spinal bifida involving the meninges) illustrate how "-cele" denotes a specific kind of swelling or herniation. The chosen answer accurately reflects this meaning, linking the suffix to conditions that feature a tumor-like or swollen appearance.

The other choices, while relevant in medical terminology, do not accurately capture the definition of "-cele." For instance, "surgical opening" pertains more closely to terms like "-stomy," "joining in a seam" relates to "-desis," and "instrument for observation" would refer to terms like "-scope." Each of these serves a distinct purpose in medical language, yet none specifically encapsulate the particular connotation of swelling or protrusion signified by "-cele."