linga means a mark , in sanskrit.it is a symbol which points to an inference.the vast world of countless forms is a Linga of the omnipotent lord.the siva linga is a symbol of lord siva .some earlier islamic scholars, later western writers and now zakir naik often use the concept of 'male generative organ' as the basis for their interpretation. biggest siva linga is in kaaba - an ancient shiva temple which muhammad did not destroy because he was affraid. "had i not seen the prophet kiss you , i would not kiss you myself.caliph omar addressing the black stone of kaaba (quoted by Zwemer (3)p150, and shaih bukhari)