'Exhibitions' is not a recognized medical term or concept; it may refer to various concepts outside the field of medicine, such as the act of displaying or showing something, but it does not have a specific medical meaning in a single sentence.

Discussions, descriptions or catalogs of public displays or items representative of a given subject.

*I'm afraid there seems to be a misunderstanding in your request as "Museums" are not a medical term and do not have a medical definition.*