IPA: /dɜːrˈməʊtəʊsɪs/
KK: /dɜrˈməʊtəˌsɪs/
A condition or disease that affects the skin, often without inflammation.
The doctor diagnosed her with a dermatosis that required special treatment.
Dermatosis is formed from "derma" (from Greek "derma", meaning skin) and "-osis" (from Greek "osis", meaning condition or disease). The word refers to a condition or disease of the skin.
Think of 'derma' meaning skin and '-osis' indicating a condition — so dermatosis refers to a skin condition.