Home › Words › P › pimplebackpimplebackpimpleback means quadrula pustulosa, an American freshwater mussel.Among words judged in Lexicurio's Arena, pimpleback ranks #16,733 of 42,749 for Qualifying.EtymologyFrom pimple + back.nounQuadrula pustulosa, an American freshwater mussel.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.wartyback 70% match — Synonym of pimpleback (mussel) vs pimpleback →lilliput 61% match — Any of various small freshwater mussels of the genus Toxolasma, found mainly in the southeastern United States. vs pimpleback →unio 61% match — Any of the genus Unio of freshwater mussels vs pimpleback →pigtoe 61% match — Any of certain mussels of the US in the genus Pleurobema vs pimpleback →creekshell 60% match — Any of various freshwater mussels vs pimpleback →deertoe 59% match — The freshwater mussel Truncilla truncata. vs pimpleback →mucket 59% match — Any of various species of mussels, especially those in the genus Lampsilis. vs pimpleback →monkeyface 59% match — The mussel Theliderma metanevra. vs pimpleback →