tab·u·la ra·sa 
(tăbyə-lə räsə, -zə)
(tăbyə-lə räsə, -zə)n. pl. tab·u·lae ra·sae (tăbyə-lē′ räsē, -zē)
1.
a. The mind before it receives the impressions gained from experience.
b. The unformed, featureless mind in the philosophy of John Locke.
2. A need or an opportunity to start from the beginning.
[Medieval Latin tabula rāsa : Latin tabula, tablet + Latin rāsa, feminine of rāsus, erased.]