[ek-strawrs, ek-strawrs]

Origin of extrorse

1855–60; < Late Latin extrorsus in outward direction, equivalent to extr(a)- extra- + (v)orsus (adv.) turned
Related formsex·trorse·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Historical Examples of extrorse

British Dictionary definitions for extrorse



  1. botany turned or opening outwards or away from the axisextrorse anthers

Word Origin for extrorse

C19: from Late Latin extrorsus in an outward direction, from Latin extra- + versus turned towards
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

extrorse in Science


  1. Facing outward, away from the central axis around which a flower is arranged. Used of anthers and the direction in which they open to release pollen.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.