That the tomato came under the scrutiny of the U.S. Supreme Court underscores its vital importance not only as a culinary staple and a cultural icon, but also as a commodity. This 19th century decision defines the status of the tomato in the American legal system, a ruling that brings the court at odds with science, but in concord with commerce.
Botanically, a tomato is a fruit, a berry. In 1887, tariff laws imposed a duty on vegetables, but not on fruits. Some smart lawyer (we find occasional evidence of these fabled creatures) representing commercial interests and Mother Nature Herself filed a case for the tomato as a fruit.
Alas, on May 10, 1893, in Nix v. Hedden (149 U.S. 304), the U.S. Supreme Court ruled–unanimously–that based use and popular perception, under customs regulations the tomato is a vegetable. The holding applies only to the legal interpretation; the justices affirmed the court’s limitations by not purporting to reclassify the tomato for other purposes.