Sentence:  A <WSD>houndstooth</WSD> fabric is composed of tiny, interlocking pinwheel motifs. There are many <WSD>houndstooth</WSD> knitting patternsnb...; to add an extra touch to these patterns, work them in nubby or textured yarns. 
Meaning of the word marked with <WSD> tags:  A two-colour fabric pattern of broken checks.