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