Meaning of lentivirus

len•ti•vi•rus

Pronunciation: (len'tu-vī"rus), [key]
— pl. -rus•es.
  1. any slow virus of the genus Lentivirus, of the retrovirus family, causing brain disease in sheep and other animals.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.