·noun A snail; also, a snail shell; a hodmandod.
II. Dodman ·noun Any shellfish which casts its shell, as a lobster.
a shell snail. See hodmadod. ...
A glossary of provincial and local words used in England by Francis Grose
A shell-fish with a hod-like lump. A sea-snail, otherwise called hodmandod. ...
The Sailor's Word-Book