found:Burl, A. From Carnac to Callanish, 1993(standing stones)
found:Peng. dict. arch.:p. 146 (A single standing stone)
found:Random House:p. 1200 (Standing stone: An upright monumental stone, standing either alone or in an alignment found chiefly in Cornwall and Brittany)
found:Web. 3:p. 1410 (Standing stone: A single upright rude monolith usually of prehistoric origin)