The Collaborative International Dictionary of English v.0.48:
Breadthways \Breadth"ways\ (br[e^]dth"w[asl]z), ads. Breadthwise. --Whewell. [1913 Webster]WordNet (r) 3.0 (2006):
breadthways adv 1: in the direction of the breadth; "cut the cloth breadthwise" [syn: breadthwise, breadthways, broadwise]