spore (spôr)n.1. A small, usually single-celled reproductive body that is resistant to adverse environmental conditions and is capable of growing into a new organism, produced especially by certain fungi, algae, protozoans, and nonseedbearing plants such as mosses and ferns.2. A megaspore or microspore.3. A dormant nonreproductive body formed by certain bacteria often in response to a lack of nutrients, and characteristically being highly resistant to heat, desiccation, and destruction by chemicals or enzymes.intr.v. spored, spor·ing, spores To produce spores.[Greek spor?, seed; see sper- in Indo-European roots.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.spore (sp??) n1. (Biology) a reproductive body, produced by bacteria, fungi, various plants, and some protozoans, that develops into a new individual. A sexual spore is formed after the fusion of gametes and an asexual spore is the result of asexual reproduction2. (Biology) a germ cell, seed, dormant bacterium, or similar bodyvb (Biology) (intr) to produce, carry, or release spores[C19: from New Latin spora, from Greek: a sowing; related to Greek speirein to sow]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014spore (sp?r, spo?r) n., v. spored, spor?ing. n. 1. the asexual reproductive body of a fungus or nonflowering plant. 2. the resting or dormant stage of a bacterium or other microorganism. v.i. 3. to produce or shed spores. [1830?40;