Definitions for vetchlingˈvɛtʃ lɪŋ
Random House Webster's College Dictionary
any of various plants of the genus Lathyrus, of the legume family, similar to the vetch.
Origin of vetchling:
any of various small plants of the genus Lathyrus; climb usually by means of tendrils
A leguminous climbing plant, notably:
Origin: vetch (leguminous plant of genus Vicia, ultimately from ) + diminutive suffix -ling
any small leguminous plant of the genus Lathyrus, especially L. Nissolia