octarch, a. Bot.
(ˈɒktɑːk)
[f. Gr. ὀκτ-ώ eight + ἀρχή beginning, origin: cf. diarch.]
Arising from eight distinct points of origin, as the woody tissue of a root.
| 1884 Bower & Scott De Bary's Phaner. 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. Ibid. 363 In the species of Trichomanes investigated, triach to octarch bundles usually occur. |