Initialism of massively multiplayer online game.

(inorganic chemistry) The binary compound of hydrogen and selenium H-Se-Se-H analogous to hydrogen peroxide / (organic chemistry) Any organic derivative R-Se-Se-R' of this compound

resistance to damage by chemicals or by ionizing radiation

(geology) An upward bend or flexure of a considerable portion of the Earth's crust, resulting in the formation of anticlinoria.