• synonyms


[het-uh-ros-puh-ruh s, het-er-uh-spawr-uh s, -spohr-]
adjective Botany.
  1. having more than one kind of spore.
Show More

Origin of heterosporous

First recorded in 1870–75; hetero- + -sporous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for heterosporous

Historical Examples of heterosporous

  • Salvinia, sal-vin′i-a, n. a genus of heterosporous ferns—formerly called Rhizocarpe or Pepperworts.

    Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements)


British Dictionary definitions for heterosporous


  1. (of seed plants and some ferns and club mosses) producing megaspores and microsporesCompare homosporous
Show More
Derived Formsheterospory, noun
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

heterosporous in Science


[hĕt′ər-ə-spôrəs, hĕt′ə-rŏspər-əs]
  1. Producing two types of spores differing in size and sex, the male microspore and the female megaspore, which develop into separate male and female gametophytes. All seed-bearing plants, as well as some ferns and other seedless plants, are heterosporous. Compare homosporous.
Show More
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.