| Subject | English | Russian |
| tech. | convex portion | выпуклая часть |
| geol. | convex portions of meanders | выпуклые участки меандр (These buried sandy bars are developed from the middle to lower stretch of the Kupa, in the convex portions of the meanders. ArcticFox) |
| tech. | convex top portion | выпуклая верхняя часть |