baluster (n.) Look up baluster at Dictionary.com
"support for a railing," c.1600, from French balustre, from Italian balaustro "pillar," from balausta "flower of the wild pomegranate," from Greek balaustion (perhaps of Semitic origin; compare Aramaic balatz "flower of the wild pomegranate"). Staircase uprights had lyre-like double curves, like the calyx tube of the pomegranate flower.