noun which may take the genitive case particle 'no'
half-eaten; partly eaten
Describes food that has been partially consumed and left unfinished. Often used as a noun modifier with の.
There was a half-eaten apple on the table.
彼は食べかけのパンをカバンに入れた。
He put the partly eaten bread into his bag.
Kanji spelling using 掛け; less common but still seen.
Compound of 食べ (stem of 食べる 'to eat') + かけ (stem of かける, indicating an action started but not completed).