Is a gossamer a type of shawl knitted from one ply wool?

Gossamer is a word that means light weight and airy, such as lace. It is also the name of a type of yarn produced by the Knit Picks yarn company, which is a fine, light weight, single strand yarn. There is also a knitting store in Oregon called Gossamer, The Knitting Place.

To answer your question, yes, a gossamer shawl would be a shawl that is knitted out of a lace weight, single ply yarn.