for the sake of greater clarity fall under two thematic groups: A) Main forms of surface karst| B) Main types of surface karst in Bulgaria. Definitions are given for each term in Bulgarian, Russian, English, French and German. Besides, some widely spread karst
formations. Thirty three terms have been defined related to different kinds of stalactite, stalagmite, columns, rimstone basins, pools and ice formations. Besides in Bulgarian, almost all terms are given in Russian, English, French and German