[{"Bold_text": "noun", "List Items": ["Zoology.any sessile marine chordate of the subphylum Tunicata (Urochordata), having a saclike body enclosed in a thick membrane or tunic two openings or siphons for the ingress and egress of water."]}, {"Bold_text": "adjective", "List Items": ["(especially of the Tunicata) having a tunic covering.", "of or relating to the tunicates.", "Botany.having or consisting of a series of concentric layers, as a bulb."]}]