[thahy-rahy-uh-sis, thi-] /θaɪˈraɪ ə sɪs, θɪ-/

crab lice infestation.
(pathol) the state or condition of being infested with lice; pediculosis

phthiriasis phthi·ri·a·sis (thĭ-rī’ə-sĭs, thī-)
Infestation with lice, especially crab lice; pediculosis.


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