a. Bot. [f. mod.L. antitrop-us, mod. Fr. antitrope (f. Gr. ἀντί against + -τροπ-ος turning) + -AL 1.] Of an embryo: Inverted, so as to have the radicle at the extremity of the seed opposite to the hilum.
1855. Balfour, Bot. (ed. 3), § 603. In an orthotropal seed the embryo is inverted or antitropal.
1866. in Treas. Bot.
