Ergosterol

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ergosterol A sterol isolated from yeast; when treated with ultra‐violet light, it is converted to ercalciol (ergocalciferol, vitamin D2). This is the main industrial source of vitamin D.

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ergosterol (er-gos-ter-ol) n. a plant sterol that, when irradiated with ultraviolet light, is converted to ergocalciferol (vitamin D2). See vitamin D.

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ergosterol A sterol occurring in fungi, bacteria, algae, and plants. It is converted into vitamin D2 by the action of ultraviolet light.

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