Sentence:  Mind you, clothes were clothes in those days. [...]  Frills, ruffles, flounces, lace, complicated <WSD>seams</WSD> and gores: not only did they sweep the ground and have to be held up in one hand elegantly as you walked along, but they had little capes or coats or feather boas. 
Meaning of the word marked with <WSD> tags:  A folded-back and stitched piece of fabric; especially, the stitching that joins two or more pieces of fabric.