St. Peter's Square, Vatican City, Vatican, seen through the Balustrade atop the Basilica. Photo by Elisabetta Villa/Getty Images News/Getty Images. Definition: A balustrade is a row of repeating balusters-small posts that support the upper rail of a railing.Staircases and porches often have balustrades. balustrade is a row of repeating balusters-small posts that support the upper rail of a railing.
dissociation, in chemistry, separation of a substance into atoms or ions. Thermal dissociation occurs at high temperatures. For example, hydrogen molecules (H. The Columbia Electronic Encyclopedia, 6th ed. Copyright Â© 2012, Columbia University Press. All rights reserved.
(dÉªËsÉÊsÉªËeÉªÊÉn; -ÊÉª-) n. 1. the act of dissociating or the state of being dissociated. 2. (Chemistry) chem. a. a reversible chemical change of the molecules of a single compound into two or more other molecules, atoms, ions, or radicals.