a. Bot. [f. Gr. ἄτροπ-ος not turned (f. ἀ priv. + τρόπος turn) + -OUS.] Of ovules: Not inverted, erect (see quot.).
1839. Lindley, Introd. Bot., 219.
1857. Henfrey, Elem. Bot., § 237. Where the nucleus is straight and the micropyle is at the end opposite the attachment of the funiculus, and the chalaza next the placenta, such an ovule is called atropous.
