Or*thot"ro*pal\, Orthotropous \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.

Note: This word has also been used (but improperly) to describe any embryo whose radicle points towards, or is next to, the hilum.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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