macrozamia: any treelike cycad of the genus Macrozamia having erect trunks and pinnate leaves and large cones with sometimes edible nuts; Australia
cycad: any tropical gymnosperm of the order Cycadales; having unbranched stems with a crown of fernlike leaves
transitivity: (logic and mathematics) a relation between three elements such that if it holds between the first and second and it also holds between the second and third it must necessarily hold between the first and third