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2 definitions found
 for orthotropous
From The Collaborative International Dictionary of English v.0.48 :

  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]

From WordNet (r) 3.0 (2006) :

      adj 1: (of a plant ovule) completely straight with the micropyle
             at the apex [ant: campylotropous]

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