fusarium
noun
fu·sar·i·um
fyü-ˈzer-ē-əm 
: any of a genus (Fusarium) of ascomycetous fungi having curved septate conidia which includes forms that are important agents of plant disease and others that produce mycotoxins implicated in human and animal disease
also
: a plant disease (such as wilt or dry rot) caused by a fusarium
Examples of fusarium in a Sentence
Recent Examples on the Web
These letters indicate resistance to verticillium wilt, fusarium wilt, nematodes, tobacco mosaic virus, and alternaria (or early blight).
—
Brandee Gruener, Southern Living, 4 July 2025
Annuals to plant: bachelor buttons, begonias, calendula, celosia, cosmos, larkspur, marigold, nasturtium, pansies, petunias, primrose, snapdragons, statice, stock, sunflowers, sweet pea and zinnias
A healthy plant that suddenly wilts and dies may be a victim of verticillium or fusarium wilt.
—Clarence Schmidt, San Diego Union-Tribune, 16 Apr. 2025
Check tomatoes for leaves that are yellowing or wilting after watering—both are signs of fusarium wilt.
—Deanna Kizis, Sunset Magazine, 14 Aug. 2023
Some fungal diseases that develop inside the plant’s stems — such as verticillium and fusarium wilts — are not affected by fungicide sprays at all.
—Beth Botts, Chicago Tribune, 5 June 2022
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Brandee Gruener, Southern Living, 4 July 2025
Annuals to plant: bachelor buttons, begonias, calendula, celosia, cosmos, larkspur, marigold, nasturtium, pansies, petunias, primrose, snapdragons, statice, stock, sunflowers, sweet pea and zinnias
A healthy plant that suddenly wilts and dies may be a victim of verticillium or fusarium wilt.
—Clarence Schmidt, San Diego Union-Tribune, 16 Apr. 2025
Check tomatoes for leaves that are yellowing or wilting after watering—both are signs of fusarium wilt.
—Deanna Kizis, Sunset Magazine, 14 Aug. 2023
Some fungal diseases that develop inside the plant’s stems — such as verticillium and fusarium wilts — are not affected by fungicide sprays at all.
—Beth Botts, Chicago Tribune, 5 June 2022
Cite this Entry
“Fusarium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fusarium. Accessed 3 Nov. 2025.
Copy CitationMedical Definition
fusarium
noun
fu·sar·i·um
fyü-ˈzer-ē-əm
1
capitalized
: a genus of ascomycetous fungi (family Tuberculariaceae) including important plant pathogens, agents (as F. solani and F. oxysporum) of infectious conditions in humans and domestic animals, and mycotoxin-producing forms (as F. moniliforme and F. proliferaturm) that contaminate agricultural products (as grain)
2
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