antitropaladj.
/ænˈtɪtrəpəl/Etymology: < modern Latin antitrop-us, modern French antitrope ( < Greek ἀντί against + -τροπ-ος turning) + -al suffix1.
Bot.1855 J. H. Balfour (ed. 3) §603 In an orthotropal seed the embryo is inverted or antitropal.
1866 in J. Lindley & T. Moore
This entry has not yet been fully updated (first published 1885; most recently modified version published online November 2010).