Corn

Corn is a part of "cornposting", which involves posting images of corn or images with corn.

Etymology
Corn refers to Zea mays var. indentata, commonly known as dent corn. Maize, also referred to as corn, has a scientific name of Zea mays; the Zea genus(whose name is derived from the Greek ζειά), on the other hand, is a "genus of five species of large grasses of the family Poaceae, native to Mexico and Mesoamerica."