Tropical vines are plants that grow in warm, humid climates and can be used for a variety of purposes. The term 'tropical vine' can refer to four different plants: LIANA, liane, cubebs, and guaco. Lianas are woody vines that climb trees and other structures, while lianes are similar but lack the woody structure. Cubebs are a type of pepper plant that is native to tropical regions, and guaco is an evergreen shrub with medicinal properties. All of these plants are found in tropical regions and can be used for various purposes.