The definition of listel is a architectural term for a narrow edge, border or molding.
(noun)An example of a listel is a decorative border around the ceiling inside a Victorian style house.
See listel in Webster's New World College Dictionary
noun
Origin: Fr < It listello, dim. of lista, a border, strip < Gmc *lista: see list
See listel in American Heritage Dictionary 4
noun
Origin:
Origin: French
Origin: , from Italian listello
Origin: , diminutive of lista, border
Origin: , of Germanic origin
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