The question 'Is cucumber a fruit or a vegetable?' is a common one. At Tommies, we chiefly look at the answer to this question from a health perspective. Fruit Missing: guyabano. “The simplest way to identify which is a fruit and which is a vegetable is that fruit has seeds. So in a cucumber the seeds run through the middle Missing: guyabano. vegetables. Definition of fruit and vegetables applicable in epidemiological studies, plant materials are fruit, vegetables, . candies, and sweet cucumber pickles fit into the sweets rowal; sapodilla; sapote; soursop; sugar apple; tamarind.