actinostele
noun
ac·tin·o·stele
ak-ˈti-nə-ˌstēl also ˌak-tə-(ˌ)nō-ˈstē-lē
plural -s
: a vascular core (as in most roots and some stems) having the xylem and phloem in alternating or radial groups within a pericycle compare stele
Word History
Etymology
actin- + stele
First Known Use
1902, in the meaning defined above