tube-shell (medicine) and chorded (iou)

tube-shell (medicine)

tube-shell
<zoology> Any bivalve mollusk which secretes a shelly tube around its siphon, as the watering-shell.

Source: Websters Dictionary

chorded (iou)

chorded adjective. L17.
[from CHORD noun1, noun2, verb see -ED2, -ED1.]
Having chords; combined in chords, in harmony.

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