citral

[si-truhl]
noun Chemistry.
a pale yellow, water-insoluble, liquid aldehyde, C 10 H 16 O, having a strong lemonlike odor, consisting in natural form of two isomers (citral a or geranial and citral b or neral) usually obtained from the oils of lemon and orange or synthetically: used chiefly in perfumery, flavoring, and the synthesis of vitamin A.

Origin:
1890–95; citr(us) + -al1

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World English Dictionary
citral (ˈsɪtrəl)
 
n
a yellow volatile liquid with a lemon-like odour, found in oils of lemon grass, orange, and lemon and used in perfumery: a terpene aldehyde consisting of the cis- isomer (citral-a or geranial) and the trans- isomer (citral-b or neral). Formula: (CH3)2C:CH(CH2)2C(CH3):CHCHO
 
[C19: from citr(us) + -al³]

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Encyclopedia Britannica
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citral

a pale yellow liquid, with a strong lemon odour, that occurs in the essential oils of plants. It is insoluble in water but soluble in ethanol (ethyl alcohol), diethyl ether, and mineral oil. It is used in perfumes and flavourings and in the manufacture of other chemicals. Chemically, citral is a mixture of two aldehydes that have the same molecular formula but different structures.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences for citral
Its flavour comes from the terpenes citronellal, citronellol, citral, and geraniol.
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