Definition from Wiktionary, the free dictionary
whetter (plural whetters)
- Something that whets. Agent noun of whet
2009 August 28, The New York Times, “Museum and Gallery Listings”, New York Times:
- More a taste whetter than a substantial introduction, this exhibition presents six of the Expressionist portraits that made Kokoschka’s reputation in the pre-World War I era and about 40 works on paper.