porcupines por·cu·pi·nes US/ˈpɔrkjʌˌpaɪnz/ uncommon noun 1. meat patties rolled in rice and simmered in a tomato sauce Synonymsporcupine ball Related words Broader terms meatball WordNet 2.1 (Princeton University). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.