Definition

Noun: A group of genetic skin disorders characterized by persistently dry, thickened, rough, and scaly skin. The scaling resembles fish scales, which is reflected in the word's origin from the Greek ichthys (fish).

Usage

"Ichthyosis" is a medical term used to describe a specific category of dermatological conditions. It is typically used as a non-count noun to refer to the general disorder or as a count noun when specifying a type (e.g., lamellar ichthyosis). It is most commonly found in clinical, scientific, and patient-education contexts.

Examples

• The dermatologist diagnosed the newborn with a mild form of ichthyosis.
• Ichthyosis is not contagious; it is an inherited condition.
• Managing ichthyosis often involves daily moisturizing and exfoliating routines.

Advanced Usage

• "Ichthyosis vulgaris": The most common and usually mildest form, often associated with other atopic conditions like eczema.
• "Harlequin ichthyosis": A very rare and severe form present at birth, characterized by thick, plate-like scales.

Variants and Related Words

• Ichthyotic (adjective): Pertaining to or affected by ichthyosis.
  • The patient presented with ichthyotic skin on the extensor surfaces.

Synonyms

• Fish scale disease (descriptive layman's term)
• Disorders of keratinization (broader medical category)

Different Meanings

This word has a single, specific medical meaning and is not used idiomatically or in non-literal contexts.

Noun

1. any of several congenital diseases in which the skin is dry and scaly like a fish