Bal vanita — if you mean “bāla-vanitā” — generally means a young woman / maiden in Sanskrit-Hindi usage. It is not a standard technical Jain tattva term in Samaysāra; if it appears there, it is usually as a सामान्य शब्द or example, not as a special सिद्धांत. ( jainqq.org)

If you want, I can also explain the exact verse/context of Samaysāra where you saw this word.