
1) Steroid alcohol 2) Sterol
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https://www.crosswordclues.com/clue/ergosterol

Ergosterol (ergosta-5,7,22-trien-3β-ol) is a sterol found in fungi, and is a component of fungal cell membranes, serving many of the same functions that cholesterol serves in animal cells. Because fungi cannot survive without ergosterol, the enzymes that create it in fungi have become important targets for drug discovery. Ergosterol is provitamin...
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http://en.wikipedia.org/wiki/Ergosterol

a white crystalline organic solid of the molecular formula C28H44O belonging to the steroid family. It is found only in fungi (e.g, Saccharomyces and ... [1 related articles]
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http://www.britannica.com/eb/a-z/e/40

<chemical> Chemical name: Ergosta-5,7,22-trien-3-ol, (3beta,22E)- ... (12 Dec 1998) ...
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http://www.encyclo.co.uk/local/20973

(әr-gos´tә-rol″) a sterol found in animal and plant tissues, which on irradiation by ultraviolet rays converts to vitamin D2, a potent agent for the prevention of rickets.
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http://www.encyclo.co.uk/local/21001

A major fungal sterol.
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http://www.encyclo.co.uk/visitor-contributions.php

Type: Term Pronunciation: er-gos′tĕr-ol Definitions: 1. The most important of the D2 provitamins; ultraviolet irradiation converts ergosterol to lumisterol, tachysterol, and ergocalciferol; main sterol in yeast, ergot, and molds. Synonyms: ergosterin
Found on
http://www.medilexicon.com/medicaldictionary.php?t=30158

Ergosterol is a naturally occurring higher alcohol which upon irradiation with ultra-violet light changes into Vitamin D.
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http://www.probertencyclopaedia.com/browse/GE.HTM

[
n] - a plant sterol that is converted into vitamin D by ultraviolet radiation
Found on
http://www.webdictionary.co.uk/definition.php?query=ergosterol
noun a plant sterol that is converted into vitamin D by ultraviolet radiation
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https://www.encyclo.co.uk/local/20974

a colorless, crystalline, water-insoluble sterol, CHOH, that occurs in ergot and yeast and that, when irradiated with ultraviolet light, is converted to vitamin D.
Found on
https://www.infoplease.com/dictionary/ergosterol
No exact match found.