Hubumbe
Muchidzidzo chePimanyika, hubumbe (convex) izwi rinotsanangudza chiumbwa chine uso hwakabumbira kunze. Mufananidzo ungapiwa kuumbwa kwakaitwa dumbu rakaguta kana kuti dutu revhu rinounganidzwa pakugadzira gandiwa rinoeredza mvura.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/d/d8/BiconvexLens.jpg/250px-BiconvexLens.jpg)
Mitauro yeBantu
chinjirudza- MaZulu vanoti amangungu (Curved, convex).