| tusk-shell | <zoology> See Tusk. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| K shell | The innermost electron orbit or shell; it can hold two electrons. (05 Mar 2000) |
| fig-shell | <zoology> A marine univalve shell of the genus Pyrula, or Ficula, resembling a fig in form. Source: Websters Dictionary (01 Mar 1998) |