Entomology definition of Phthiriasis September 12, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Phthiriasis Entomology definition of Phthiriasis: a diseased condition of the skin caused by sucking lice. Entomology Phthiriasis definitionPhthiriasis Entomology explanationPhthiriasis Entomology meaningReviews & Comments