"Fibrous vegetables" refers to vegetables that are high in dietary fiber, which is a type of carbohydrate that helps with digestion and maintaining a healthy digestive system. Full definition
A ton of fibrous vegetables get slicked with a good bacteria - rich kefir dressing. (bewell.com)
Eat as many fibrous vegetables as you can eat along with main meals. (lowcarbalpha.com)
It's also important for highly fibrous vegetables like kale or onions, which produce much more pulp; if you're a green smoothie fanatic then automatic pulp ejection is vital. (supernaturalacnetreatment.com)