Term Name:	medial-radial axis
Synonyms:	M-R axis, MR axis
Definition:	An anatomical axis that is perpendicular to an apical/basal axis or proximal/distal axis and extends from the center of an axis (shoot axis or root in the case of plants) to any point on the exterior of the axis.
Ontology:	Spatial Ontology [BSPO:0000197]