ich
noun
variants
also ick
plural ichs also icks
: a severe dermatitis of freshwater fish caused by a protozoan of the genus Ichthyophthirius (I. multifiliis) and especially destructive in aquariums and hatcheries
called also ichthyophthiriasis, ichthyophthirius
Cite this Entry
“Ich.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/ich. Accessed 31 Oct. 2025.
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