Definitions for nubility
Random House Webster's College Dictionary
nu•bileˈnu bɪl, -baɪl, ˈnyu-(adj.)
(of a young woman) suitable for marriage, esp. in regard to age or physical development.
(of a young woman) sexually developed and attractive.
Origin of nubile:
1635–45; < L nūbilis=nūb(ere) to marry (see nuptial ) +-ilis -ile1
the state of being marriageable