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2017 Word of the Year

appressorium

[ap-re-sawr-ee-uh m, -sohr-] /ˌæp rɛˈsɔr i əm, -ˈsoʊr-/
noun, plural appressoria
[ap-re-sawr-ee-uh, -sohr-] /ˌæp rɛˈsɔr i ə, -ˈsoʊr-/ (Show IPA).
Mycology.
1.
a flattened and thickened tip of a hyphal branch, formed by some parasitic fungi, that facilitates penetration of the host plant.
Origin of appressorium
1895-1900
1895-1900; < New Latin, equivalent to Latin appress(us) (see appressed) + -ōrium (see -tory2)
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Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for appressoria

appressorium

/ˌæprɛˈsɔːrɪəm/
noun (pl) -ria (-rɪə)
1.
(botany) a flattened hypha of a parasitic fungus that penetrates the host tissues
Word Origin
from New Latin, from Latin appressus; see appressed
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
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