Paraduodenal smear is a medical term used to describe a specific type of diagnostic test for various gastrointestinal conditions. However, there are several synonyms used in the medical field to describe this test. These include duodenal aspirate, duodenal fluid collection, and duodenal lavage. Other synonyms include duodenal washout, duodenal secretion, duodenal fluid analysis, and duodenal fluid cytology. These terms all refer to the same test that involves obtaining fluid or cells from the duodenum for analysis. The choice of term may depend on the specific medical context or the preference of the healthcare provider.