-tropous

-tropous

suff. Turning in a specified way or from a specified stimulus: amphitropous.
[From Greek -tropos, of turning, from tropos, changeable, from trepein, to turn; see trep- in Indo-European roots.]

-tropous

adj combining form (Biology) indicating a turning away: anatropous. [from Greek -tropos concerning a turn]

-tropous

a combining form meaning “turned, curved” in the direction specified by the initial element: orthotropous. [< Greek -tropos; see -trope, -ous]