Added 10 October 2026 littorinidae noun Categories: AnimalsObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about littorinidae at Wordnik → Where our words come from → Periwinkles. Related Words: periwinkleslittorinacicindelidaelorisidaeelateridaelaridaeotariidaephyllostomidaetheridiidaeblenniidaearctiidae Back to today's word