The shoe worn by actors of comedy in ancient Greece and Rome, -- used as a symbol of comedy, or of the comic drama, as distinguished from tragedy, which is symbolized by the buskin.
(also called Sock Lining Modern terms include: Inner sock) An inner sole used to cover the Insole. These may not have been used in the Middle Ages. A piece of material stuck inside a shoe to cover the insole; a "heel sock" just covers the back part (heel seat). Its purpose is to cover nail points or stitches but it may also carry the maker's name, trade mark, etc. To avoid confusion with hosiery, may be termed in- or insole sock [Thornton/Swann, 1983] A short stocking usually reaching to the calf or just above the ankle. [Webber, 1989] Sock Lining. A piece of material inside a shoe to cover the sole or insole. It can be both decorative and functional, to hide the construction marks on the insole. Various descriptive terms are used according to length: heel, three-quarter, or full. Shoemakers often refer to this lining simply as "sock". [Webber, 1989