What makes corn a grain?

Botanically, corn, also known as maize, is not a grain but a fruit, specifically a type of large starchy fruit known as a caryopsis. However, in culinary and everyday usage, corn is frequently referred to as a grain due to its similar role in human nutrition and cuisine. It has a high starch content that makes it useful for various grain-like purposes, but botanically, corn belongs to the Poaceae family and the genus Zea.