(a.) Having the axis of an ovule or seed straight from the hilum and chalaza to the orifice or the micropyle; atropous.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). orthotropous. Retrieved September 27, 2026, from http://smartdefine.org/orthotropous/definitions/2039625 |
| Chicago | Webster's. 2011. "orthotropous" http://smartdefine.org/orthotropous/definitions/2039625 (accessed September 27, 2026). |
| Harvard | Webster's 2011, orthotropous, Smart Define, viewed 27 September, 2026, <http://smartdefine.org/orthotropous/definitions/2039625>. |
| MLA | Webster's. "orthotropous" 27 May 2011. Web. 27 September 2026. <http://smartdefine.org/orthotropous/definitions/2039625> |