Note: Do not rely on this information. It is very old.
Blue-stocking
Blue-stocking, a literary lady; the term is generally used in derision. The name derives its origin from certain assemblies at the houses of different ladies, held about 1750 in London, where a certain Mr. Stillingfleet attended who was in the habit of always wearing blue stockings. The term thus got to be applied to those who frequented the meetings.
Click for more about Stillingfleet

