{{unreferenced, date=March 2015
The annulus, or annular space, is the space between a penetrant and whatever surrounds it, such as the sides of an opening or a
sleeve
A sleeve ( ang, slīef, a word allied to '' slip'', cf. Dutch ) is the part of a garment that covers the arm, or through which the arm passes or slips.
The sleeve is a characteristic of fashion seen in almost every country and time period, ac ...