A "grain kernel" refers to the small, inner part of a cereal grain, such as wheat or corn. It is the part that contains essential nutrients like carbohydrates, proteins, and vitamins. Full definition
Whole grains contain all the essential parts and naturally occurring nutrients of the entire grain kernel in their original proportions. (gobarley.com)
Whole grain means that the entire grain kernel is in the food. (diabetes.org)
Do not serve any type of bread or crackers that contain seeds, nuts or whole grain kernels of any kind. (howtoadult.com)