A type of resinous substance or coating used in finishing or protecting surfaces, particularly in woodworking and leather treatment.
Origin unclear, possibly from a blend of 'case' and 'col' (from Latin 'collum' meaning neck or from chemical nomenclature). The term appears in technical literature related to surface treatments and may have industrial origins in European manufacturing.
This word is a perfect example of how technical jargon develops in specialized trades—craftspeople and manufacturers create terms that are perfectly understood within their community but rarely make it into mainstream dictionaries, showing how language evolves in hidden professional worlds.
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