| Term | Definition |
| OBLIQUELY OVATE | An OVATE shape which has been titlted to one side. See other gastropod shapes. | |
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| OBOVATE | Reversed OVATE; having the greatest width above the APERTURE, toward the apex. OVATE, with the narrower end basal. See other gastropod shapes. | |
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| OVATE |
Egg-shaped, with the basal end broader; see also: OBLIQUELY OVATE; OBOVATE. See other gastropod shapes. Photo: Granulina ovuliformis (Orbigny, 1841) |
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