| Answer | Crossword Clue |
|---|---|
| bivalvate | of molluscs, having two valves |
| bivalvular | having two valves |
| frustule | The silicified cell wall of a diatom, consisting of two valves or overlapping halves |
| clamshell | The shell of a clam, formed of two roughly equal valves with a hinge |
| clamshells | The shell of a clam, formed of two roughly equal valves with a hinge |
| frustules | The silicified cell wall of a diatom, consisting of two valves or overlapping halves |
| inarticulates | INARTICULATE, any of a class of brachiopods lacking a hinge connecting the two shell valves |
| inarticulate | not articulate also UNARTICULATE / any of a class of brachiopods lacking a hinge connecting the two shell valves |
