noun which may take the genitive case particle 'no', noun
edible; for food use
Describes something intended for eating, as opposed to ornamental, industrial, or other uses. Commonly used in compounds like 食用油 (cooking oil) or 食用花 (edible flowers).
このキノコは食用ですか。
Is this mushroom edible?
食用の花をサラダに飾った。
I garnished the salad with edible flowers.
食べられる is the potential form of 食べる and simply means 'can be eaten'; 食用 specifically means 'intended for eating' or 'for food use', often in a commercial or categorical sense.
Compound of 食 (eating) and 用 (use, purpose). The meaning is transparent from its components.