Noun
The fruit of this plant.
Sechium edule, a tropical American perennial herbaceous vine having tendrils, tuberous roots, and a green, pear-shaped fruit cooked as a vegetable.
Synonym: mirliton
PAMELA says: I have used chayote squash in the past as a saute with bell peppers of all colors, sweet onions, mushrooms and fava beans. Source: Internet
Cover, reduce heat to maintain a simmer and let simmer for about 30 minutes until the chayote is soft and cooked through. Source: Internet
From the pictures, I think what you're calling chow-chow is marketed in the US as chayote squash. Source: Internet
In my father's country chow-chow is called Christophine, and im my mother's country it is called Cho-cho, and in many countries it is chayote. Source: Internet