pentarch

pentarch

(ˈpɛntɑːk)
n
(Government, Politics & Diplomacy) any one of a group of five rulers; any member of a pentarchy
adj
(Botany) (of a plant) possessing five xylem rays
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
However, Souza (2009), who examined seedlings of other eudicots, found that primary roots may present from two (diarch) to five (pentarch) protoxylem poles.