octarchadj.
/ˈɒktɑːk/, U.S. /ˈɑkˌtɑrk/ Botany.
Relating to, characterized by, or designating a vascular bundle having eight strands of xylem arising from eight distinct points of origin.
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the world > plants > part of plant > cell or aggregate tissue > [adjective] > having particular number of points of origin
heptarch1884
octarch1884
oligarch1884
pentarch1884
polyarch1884
tetrarch1884
triarch1884
hexarch1900
1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 350 In the heptarch or octarch examples of L. clavatum investigated, I almost always found one of the concave plates larger, and of narrow horseshoe-like cross-section, the other smaller and much flatter.
1895 Proc. Royal Soc. 58 199 The stele varies from triarch to octarch structure in different specimens.
1910 New Phytologist 9 150 The roots seem to be primarily triarch, though other primary strands appear later, so that older roots are hexarch to octarch.
1995 Amer. Jrnl. Bot. 82 1480 Orthoceras strictum. Undissected, octarch siphonostele.
This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).
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adj.1884