Of or relating to plants.

Is vegetable a noun?

VEGETABLE (noun) definition and synonyms | Macmillan Dictionary.

Can Vegetable be used as an adjective?

Included below are past participle and present participle forms for the verbs vegetate, veganize, vegetarianize and vegetize which may be used as adjectives within certain contexts. Of or relating to plants; especially to their growth. Physically inactive.