what does Smilax rotundifolia mean?

SMILAX ROTUNDIFOLIA as NOUN

Meaning
- a very prickly woody vine of the eastern United States growing in tangled masses having tough round stems with shiny leathery leaves and small greenish flowers followed by clusters of inedible shiny black berries
Synonym(s)
- briar (what does briar mean?)
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Hypernyms(s) Smilax rotundifolia is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
- vine (what does vine mean?)