xanthophyll
Noun: 1. A yellow carotenoid pigment: Xanthophyll is a type of yellow pigment found in plants, algae, and some bacteria. It is a subclass of carotenoids, which are organic pigments. Unlike some carotenoids (like beta-carotene), xanthophylls contain oxygen. 2. A pigment in biological tissues: It is responsible for the yellow coloration in many natural sources, such as autumn leaves, corn, egg yolks, and animal fats.
Xanthophyll is a scientific term used primarily in biology, biochemistry, and nutrition. It refers to the specific chemical compound responsible for yellow color.
- Scientific Context:
- The yellow color of autumn leaves is due to the presence of xanthophyll after chlorophyll breaks down.
- Lutein and zeaxanthin are specific types of xanthophyll that are important for eye health.
- Nutritional Context:
- Egg yolks get their rich yellow color from dietary xanthophylls like lutein.
- Plural Form: The word is often used in its plural form, xanthophylls, when referring to this class of pigments collectively.
- Scientists study the antioxidant properties of various xanthophylls.
- Xanthophylls (n., plural): The collective term for this group of pigments.
- Lutein (n.): A specific and common type of xanthophyll found in green leafy vegetables and egg yolks.
- Zeaxanthin (n.): Another specific xanthophyll, often found alongside lutein in the human eye.
- Carotenoid (n.): The broader category of pigments to which xanthophylls belong. All xanthophylls are carotenoids, but not all carotenoids (e.g., orange beta-carotene) are xanthophylls.
- Lutein (a specific type of xanthophyll)
- Yellow pigment (a general descriptive term, not a precise synonym)
The term has a single, specific scientific meaning related to yellow, oxygen-containing carotenoid pigments. It is not used in everyday conversation but is standard in technical fields.
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yellow carotenoid pigments in plants and animal fats and egg yolks
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