Helical

hel'ik-al, adj. spiral. adv Hel ically. Heliocentric, he-Ii-o-sen'trik, Helio centrical, he- -o-sen'trik-al, adj. (astr as seen from the suns centre adv. Heliocen'trically. [From Gr. helios the sun, kentron the centre Heliograph, he'li-o-graf, n an apparatus for telegraphing by means of the sun’s rays.