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The Collaborative International Dictionary of English v.0.48 (gcide)

Orthotropal \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.
[1913 Webster]

Note: This word has also been used (but improperly) to
describe any embryo whose radicle points towards, or is
next to, the hilum.
[1913 Webster]

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