{ Or‐thot″ro‐pal (?), Or‐thot″ro‐pous (?), } a. [Ortho- + Gr. � to turn: cf. F. orthotrope.] (Bot.) Having the axis of an ovule or seed straight from the hilum and chalaza to the orifice or the micropyle; atropous.
☞ This word has also been used (but improperly) to describe any embryo whose radicle points towards, or is next to, the hilum.