Chicory
WordNet
noun
(1) Crisp spiky leaves with somewhat bitter taste
(2) Root of the chicory plant roasted and ground to substitute for or adulterate coffee
(3) Perennial Old World herb having rayed flower heads with blue florets cultivated for its root and its heads of crisp edible leaves used in salads
(4) The dried root of the chicory plant: used as a coffee substitute