jackknife clam

(redirected from jackknife clams)
Also found in: Thesaurus.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.jackknife clam - marine clam having a long narrow curved thin shelljackknife clam - marine clam having a long narrow curved thin shell
clam - burrowing marine mollusk living on sand or mud; the shell closes with viselike firmness
Ensis, genus Ensis - razor clams