col·on·nette 
(kŏl′ə-nĕt)
(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-2 in the Appendix of Indo-European roots.]