Oatmeal n. : Meal made of oats.

Oatmeal n. : A plant of the genus Panicum; panic grass.

Example:
What kind of Oatmeal am I supposed to eat while breastfeeding?

Taxonomy
oatmeal, oats, rolled oats, porridge, instant oatmeal, foods, free encyclopedia, oatmeal cereal, Oatmeal porridge, Scotland, cook, heat, ground, crushed oats, oat bran, Breakfast cereal, groats, small pieces.

Defination from the web:
oatmeal cereal or stirabout, in Ireland) ... The groats are coarsely ground to make oatmeal, or cut into small pieces to make steel-cut oats, or are first steamed and then flattened to make rolled oats. ...