colonnette
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Related to colonnette: tracery
col·on·nette
(kŏl′ə-nĕt′)n.
A small, relatively thin column, often used for decoration or to support an arcade.
[French, diminutive of colonne, column, from Old French columpne, from Latin columna; see kel- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.