(n) an abnormal tufted growth of small branches on a tree or shrub caused by fungi or insects or other physiological disturbance, Syn. staghead, hexenbesen, witch broom
n. [ Hex- + eikosane. ] (chem.) A hydrocarbon, C26H54, resembling paraffine; -- so called because each molecule has twenty-six atoms of carbon. [ Written also hexacosane. ] [ 1913 Webster ]