a combining form meaning “one turned toward” that specified by the initial element (heliotrope); also occurring in concrete nouns that correspond to abstract nouns ending in -tropy or -tropism: allotrope.
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Origin of -trope
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
n combining form
indicating a turning towards, development in the direction of, or affinity toheliotrope
Word Origin for -trope
from Greek tropos a turn
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
word-forming element meaning "that which turns," from Greek tropos (see trope).
Online Etymology Dictionary, © 2010 Douglas Harper