Corn VS Sweetcorn in American English [closed]

In american english, when you say the word 'corn', are you referring to the maze plant or the sweetcorn or the maze plant's seeds?

Let's try The Free Dictionary

corn¹
n.
1.
a. Any of numerous cultivated forms of a widely grown, usually tall annual cereal grass (Zea mays) bearing grains or kernels on large ears.
b. The grains or kernels of this plant, used as food for humans and livestock or for the extraction of an edible oil or starch. Also called Indian corn, maize.
2. An ear of this plant.

and

sweetcorn
n.
1. (Plants) Also called: sugar corn or green corn. A variety of maize, Zea mays saccharata, whose kernels are rich in sugar and eaten as a vegetable when young

So the answer is yes to all three questions.