The Collaborative International Dictionary
Antitropous
Antitropal \An*tit"ro*pal\, Antitropous \An*tit"ro*pous\, a.
[Pref. anti- + Gr. ? turn, ? to turn.] (Bot.)
At the extremity most remote from the hilum, as the embryo,
or inverted with respect to the seed, as the radicle.
--Lindley.
Wiktionary
antitropous
a. (context botany English) Displaying, of, or pertaining to antitropy.