Definition of Niantic in US English:

Niantic

(also Nehantic)

noun

historical
  • A member of either of two North American Indian peoples living along the coast of Rhode Island and Connecticut at the time of first European contact.

adjective

historical
  • Of or relating to the Niantics.

Origin

Mid 17th century; earliest use found in Roger Williams. From the names in south-eastern New England Algonquian languages of two places, and the ethnic name based on these (e.g. Narragansett Nayantakoog, plural).

Pronunciation

Niantic

/nʌɪˈantɪk/