melanin

• مجموعة من الصبغات الطبيعية الموجودة في معظم الكائنات الحية، وهي المسؤولة عن لون الجلد والشعر والقشور والريش. توجد أيضاً في بعض الأنسجة النباتية والكائنات الدقيقة.

A noun referring to a group of natural pigments found in most organisms, responsible for the coloration of skin, hair, scales, and feathers.

غير معدود

1. Biological pigmentB2formalscientific

   A dark, insoluble pigment produced by cells, primarily responsible for the coloration of skin, hair, eyes, and other tissues in animals.

   صبغة بيولوجية

   • Melanin levels determine a person's natural skin tone.
   • The dark color of feathers in many birds is due to melanin.
   • Albinism is caused by a lack of melanin production.

2. Ultraviolet protectionC1formalmedical

   A natural substance in the skin that absorbs harmful UV radiation, helping to prevent sun damage and reducing the risk of skin cancer.

   الحماية من الأشعة فوق البنفسجية

   • Sunscreen works by supplementing the skin's own melanin barrier.
   • People with lighter skin produce less melanin and burn more easily.
   • Melanin acts as a natural photoprotectant against sun exposure.