soft-shell clam softs·hellc·lam uncommon noun 1. a clam that is usually steamed in the shell Synonymssoft-shell clamsteamersteamer clamlong-neck clam 2. an edible clam with thin oval-shaped shell found in coastal regions of the United States and Europe Synonymssoft-shell clamsteamersteamer clamlong-neck clamMya arenaria Related words Word family steam Broader terms clam Parts soft-shell clamMya Part of soft-shell clam WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.