Adherent

: The word's earliest known use dates back to the Middle English period, approximately 1425 .

Medication Adherence and Compliance: Recipe for Improving ... - PMC adherent

: Describing something that is sticky , clinging , or adhering . It can also describe a nation or group bound by a formal agreement, such as nations adherent to a specific convention . : The word's earliest known use dates back

: A person who strongly supports a particular person, principle, or set of ideas, such as an adherent of a political party or a religious movement. Common synonyms include supporter , follower , disciple , and partisan . or set of ideas