Pronunciation: (ap"re-sôr'ē-um, -sōr'-), [key]
—pl. -so•ri•aPronunciation: (-sôr'ē-u, -sōr'-). [key] Mycol.
a flattened and thickened tip of a hyphal branch, formed by some parasitic fungi, that facilitates penetration of the host plant.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.