Which suffix indicates 'pertaining to' in medical terminology?

The suffix that indicates 'pertaining to' in medical terminology is indeed represented by the group of suffixes that includes -ac, -al, and -ar. Each of these suffixes serves a similar function in the formation of medical terms, linking a root word to convey the meaning 'related to' or 'pertaining to.'

• The suffix -ac is often used in words like cardiac, which relates to the heart.

• The suffix -al can be found in words such as renal, referring to the kidneys.

• The suffix -ar is used in words such as muscular, which pertains to muscles.

This group emphasizes a connection to a particular body part or system, thus providing critical context in medical language. The other suffixes listed—-ic, -ous, and -ory—also imply a relationship but are not as broadly applicable for indicating 'pertaining to' as the selected group. Each of these suffixes carries specific nuances and applications in medical terms but opting for the broader grouping captures a wider range of relevant terminology in the context of medical language.