the GNU version of the Collaborative International Dictionary of English
n. The quality or state of being virulent or venomous; poisonousness; malignancy.
n. Extreme bitterness or malignity of disposition.
The Century Dictionary and Cyclopedia
n. The quality of being virulent, or charged with virus.
n.Synonyms Poisonousness, venom, deadliness.
n. Asperity, Harshness. See acrimony.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. extreme hostility
n. extreme harmfulness (as the capacity of a microorganism to cause disease)
Word Usage
"Throughout the manuscript, the term virulence factor will be used in accordance with the definition proposed by Wood et al; "A component of a pathogen that when deleted specifically impairs virulence but not viability""