Infundibulum is a term used to describe a funnel-shaped structure in various parts of the human body. Although it is a medical term, there are a few synonyms that can be used interchangeably. For instance, the "ostium" is a synonym for infundibulum and is a term used to refer to an opening or orifice that connects different parts of the body. Another synonym for infundibulum is the "funnel," which is a term used to describe a conical or funnel-like shape. Moreover, the "receptaculum" and "fossa" can also be used interchangeably with the infundibulum to describe a depression or a cavity. In summary, the infundibulum has several synonyms that can be used to describe its funnel-shaped structure in different parts of the human body.