Sore areas that form due to the skin rubbing against another surface, causing separation of the layers of the skin. Fluid may accumulate between these layers of skin.
Found on http://www.encyclo.co.uk/local/20560
Bubbles formed in the body of pottery and projecting from it. Blisters are formed by gases which are unable to escape because of too fast a firing. Reduction atmospheres can aggravate blistering. Found on https://ashbrook-ceramics.co.uk/pottery-glossary/
undesirable rounded elevation of the surface of a plastic, whose boundaries may be either more or less sharply defined, somewhat resembling in shape a blister on the human skin. A blister may burst and become flat. Found on https://www.usplastic.com/knowledgebase/article.aspx?contentkey=784