quahog

 
Pronunciation: /ˈkwɔːhɒg, ˈkwɑː-/
(also quahaug /-hɔːg/)

noun

North American
  • a large, rounded edible clam of the Atlantic coast of North America. Also called hard clam, hardshell clam.
    • Venus mercenaria, family Veneridae

Origin:

mid 18th century: from Narragansett poquaûhock