What is "dragon fruit"

alt. The fruit of certain cacti of the genus (taxlink Hylocereus genus noshow=1), cultivated in Southeast Asia and Central and South America, having cerise-pink- or yellow-coloured skin and a white or pink sweet fleshy interior with black seeds. n. The fruit of certain cacti of the genus (taxlink Hylocereus genus noshow=1), cultivated in Southeast Asia and Central and South America, having cerise-pink- or yellow-coloured skin and a white or pink sweet fleshy interior with black seeds.