transapical, a. Bot.
(trɑːnsˈæpɪkəl, træns-, -ˈeɪpɪkəl)
[f. trans- 5 + L. apex, apic-em, apex n.: see apical.]
Transverse to the apical axis (of a diatom).
| 1900 B. D. Jackson Gloss. Bot. Terms 273 Transapical,..at right angles to the apical axis, passing through the centre of the pervalvar (main longitudinal) axis of a Diatom; transapical Plane, the plane at right angles to both valvar and apical planes, passing through the pervalvar and transapical axis (O. Mueller). |