The Collaborative International Dictionary of English v.0.48:
Unparented \Un*par"ent*ed\, a. Having no parent, or no acknowledged parent. [R.] [1913 Webster]WordNet (r) 3.0 (2006):
unparented adj 1: having no parent or parents or not cared for by parent surrogates [syn: unparented, parentless] [ant: parented]