Definition of spore in English:

spore

noun

  • 1Biology
    A minute, typically one-celled, reproductive unit capable of giving rise to a new individual without sexual fusion, characteristic of lower plants, fungi, and protozoans.

    • ‘Grain mold fungi also produce spores capable of aerial dispersal in the field as well as within a grain storage bin.’
    • ‘Bunt fungi survive as resting spores on contaminated seed.’
    • ‘Many questions concerning toxicity and allergenicity have been raised about corn contaminated with the spores of this fungus.’
    • ‘At flowering, the fungus grows through the floral tissue and forms masses of spores in place of healthy seed.’
    • ‘It reproduces prolifically and produces spores at all stages of its life.’
    embryo, bud, nucleus, seed, spore, egg, ovum
    1. 1.1Botany (in a plant exhibiting alternation of generations) a haploid reproductive cell which gives rise to a gametophyte.
      • ‘When contaminated seeds are planted, bunt spores germinate in the presence of moisture and infect the wheat seedlings.’
      • ‘After landing on a host plant, spores germinate and produce a germ tube that grows across the leaf surface.’
      • ‘A spore can infect a plant and cause a new lesion which will produce spores in 7-10 days.’
      • ‘The gametophyte is haploid, that is, each cell contains a single complete set of chromosomes, and arises from the germination of a haploid spore.’
      • ‘When infected flowers or leaves are plucked, a grayish-white cloud of fungal spores can usually be seen.’
    2. 1.2Microbiology (in bacteria) a rounded resistant form adopted by a bacterial cell in adverse conditions.
      • ‘In the production of dry milk these bacterial spores are able to survive the spray-drying process.’
      • ‘A concentration of just 5 parts per million was adequate to eradicate 50,000 spores under laboratory conditions.’
      • ‘While the spores are not extremely long lived, they could survive this form of movement.’
      • ‘It is heat-sensitive and dies as it dries, so is a much less attractive weapon than anthrax spores, which are many thousands of times more resistant.’
      • ‘The scientists' next step, for most pathogens, is to collect the spores.’

Origin

Mid 19th century from modern Latin spora, from Greek spora ‘sowing, seed’, from speirein ‘to sow’.

Pronunciation

spore

/spɔː/