outward curve
- convexCurved outward externally
- bulgeOutward curved projection
- arcCurved line segment
- bowRespectful forward inclination
- swellIncrease in size
camber · dome · hump · belly · protrusion · arching · rounded · parabola · curvature · bend · balloon · billow · protruding · swelling · crescent · arch · bowing · pregnant
outward curveconcavity
Inward-curving surface quality
concave · incurve · depression · indentation · hollow