Plum tomatoes are sold separately or on a vine, so you can 'harvest' the tomatoes at home, as it were. Plum tomatoes have an oval shape and are ruby red. One respondent said: “Everyone knows tomatoes are fruit, but some of the others In an avocado or olive, the seed is the stone at the centre. The classical vegetable/fruit story is the tetchy tale of the tomato. into your garden, they're more likely to pinch the peaches than the peas. In , the U.S. Supreme Court was asked to decide whether a tomato was a fruit or a vegetable after importer John Nix was slapped with a. The Nix family's lawyer read the Justices the definitions for "fruit," "vegetable," and "tomato" from various dictionaries and even called in expert. Definition of fruit and vegetables applicable in epidemiological studies, .. tomato. Chiorogenic acid: Apple, apricot, blackberry, blueberry, cherry, cranberry.