| Term | Definition |
| ELLIPTICAL |
Like an ellipse or flattend oval; see also: ELONGATE ELLIPTICAL. See other bivalve shapes |
|
|
| ELONGATE ELLIPTICAL |
A basically ELLIPTICAL shape that has been elongated; like a flattened oval. See other bivalve shapes. |
|
|
| SUBELLIPTICAL | [need definition]. See other bivalve shapes. | |
|