noun: (informal, uncountable) Something distasteful or physically unpleasant to touch.
noun: (informal, as "the ick") A feeling of revulsion.
noun: (slang) Anything moaned about; a gripe.
adjective: (informal) icky; distasteful or unpleasant.
noun: Alternative form of ich (“fish disease”) [(ichthyology) Ichthyophthiriasis, a parasitic infection of freshwater fish caused by the ciliate Ichthyophthirius.]
noun: (biochemistry) Initialism of inhibitor cystine knot.