Merriam-Webster Collegiate Dictionary - whelk

 I. noun  Etymology: Middle English welke, from Old English weoloc; akin to Middle Dutch willoc ~ and perhaps to Latin volvere to turn — more at voluble  Date: before 12th century any of numerous large marine snails (as of the genus Buccinum); especially one (B. undatum) used as food in Europe  II. noun  Etymology: Middle English ~e, from Old English hwylca, from hwelian to suppurate  Date: before 12th century papule, pustule