dandelion UK /ˈdæn.dɪˌlaɪ.ən/US /ˈdæn.dəˌlaɪ.ən/noun 3adjective 1forms 1 noun3 •Any of the several species of plant in the genus Taraxacum, characterised by yellow flower heads and notched, broad-ended leaves, especially the common dandelion (Taraxacum officinale).There are asexual variants among all sorts of creatures, including jellyfish, dandelions, lichens and lizards. — 2018 •The flower head or fruiting head of the dandelion plant. •A yellow colour, like that of the flower. adjective1 •Of a yellow colour, like that of the flower. formsdandelions