| keratosa | <zoology> An order of sponges having a skeleton composed of hornlike fibres. It includes the commercial sponges. Origin: NL, fr. Gr, a horn. Source: Websters Dictionary (01 Mar 1998) |
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| acne keratosa | An eruption of papules consisting of horny plugs projecting from the hair follicles, accompanied by inflammation. (05 Mar 2000) |
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