trəˈkȯˌlän, -_lən noun
Usage: capitalized
Etymology: New Latin, probably from tra chy- + Greek kaulos stem, stalk — more at hole
in some classifications : a genus of herbaceous vines (family Polygonaceae) occurring in No. America and Asia, having prickly or bristly stems, prickly veined leaves mostly hastate or cordate at the base, racemose flowers, and angled fruits, and being commonly included in the genus Polygonum