tendril
/ˈtendrɪl/noun
1- a slender thread-like appendage of a climbing plant, often growing in a spiral form, which stretches out and twines round any suitable support（植物的）卷须。
1.1
- something resembling a plant tendril, especially a slender curl or ringlet of hair卷须状物（尤指发卷）。
词源
mid 16th cent.: probably a diminutive of Old French tendron 'young shoot', from Latin tener 'tender'.