What does "corn sugar" mean?

Dextrose, especially originating from corn starch.

What is a synonym for "corn sugar"?

Common synonyms include: dextrose.

noun

noun ·Rare ·Advanced level

Noun

1
Dextrose, especially originating from corn starch. countable, uncountable
"Corn sugar is a key ingredient in home beer making."
2
dextrose used as sweetening agent wordnet
3
A deceptive term for high fructose corn syrup developed by corn refiners meant to imply sugar. countable, uncountable
"Last week, the industry group applied to the federal government for permission to use a new name for the ingredient on food labels: "corn sugar.""
4
dextrose made by hydrolysis of cornstarch wordnet

"Corn sugar is a key ingredient in home beer making."

From corn + sugar.