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appressorium

American

[ap-re-sawr-ee-uhm, -sohr-] / ˌæp rɛˈsɔr i əm, -ˈsoʊr- /

noun

Mycology.

a flattened and thickened tip of a hyphal branch, formed by some parasitic fungi, that facilitates penetration of the host plant.

appressorium British

/ ˌæprɛˈsɔːrɪəm /

noun

botany a flattened hypha of a parasitic fungus that penetrates the host tissues

"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

Etymology

Origin of appressorium

1895–1900; < New Latin, equivalent to Latin appress ( us ) ( see appressed) + -ōrium ( see -tory ²)

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023