ichthyophthirius

noun
ich·​thy·​oph·​thir·​i·​us | \ ˌik-thē-äf-ˈthir-ē-əs How to pronounce ichthyophthirius (audio) \

Medical Definition of ichthyophthirius

1 capitalized : a genus of oval ciliates (order Holotricha) that are included in a single species (I. multifiliis) and are parasitic in the skin of various freshwater fishes where they encyst and multiply causing a severe and sometimes fatal inflammation
2 : ich

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