Definition of thwartwise
                                                                                                    
                                                                            (adj) 
                                                                                                                                                         extending or 
lying across; in a 
crosswise direction; at 
right angles to the 
long axis; "cross members should be all steel"; "from the transverse 
hall the 
stairway ascends gracefully"; "transversal vibrations"; "transverse colon"