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ap·pres·so·ri·um | \ ˌa-pre-ˈsȯr-ē-əm 
\
\ plural appressoria\ ˌa-pre-ˈsȯr-ē-ə \
\Definition of appressorium
: the flattened thickened tip of a hyphal branch by which some parasitic fungi attach to and penetrate their host
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The first known use of appressorium was in 1897
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