plural of carbon arc

plural of electric arc

plural of subhelic arc

plural of tropical arc

plural of arc boutant

plural of island arc

A ski resort in the Savoie department, Auvergne-Rhône-Alpes, France. / A commune in Var department, Provence-Alpes-Côte d'Azur, France.

(geology) A tectonic plate convergent boundary in Micronesia

Epioblasma arcaeformis, an extinct species of freshwater mussel.

(archaeology, US, usually capitalized) A general term for the prehistoric period intermediate between the earliest period (‘Paleo-Indian’, ‘Paleo-American’, ‘American‐paleolithic’, &c.) of human presence in the Western Hemisphere, and the most recent prehistoric period (‘Woodland’, etc.).