[tu.ni.cate] also tu.ni.cat.ed adj [L tunicatus, fr. tunica] (ca. 1623) 1 a: having or covered with a tunic or tunica b: having, arranged in, or made up of concentric layers "a ~ bulb"
2: of or relating to the tunicates
[2]tu.ni.cate n [NL Tunicata, fr. neut. pl. of L tunicatus] (1889): any of a subphylum (Urochordata syn. Tunicata) of marine chordate animals that have a thick secreted covering layer, a greatly reduced nervous system, a heart able to reverse the direction of blood flow, and only in the larval stage a notochord