alizarin /əˈlɪz(ə)rɪn/

a

I. noun [ mass noun]

1.
[Chemistry] a red pigment present in madder root, used in dyeing.

●Chem. formula: C14H8O4.
2. [as modifier]
[Chemistry] denoting dyes derived from or similar to alizarin

alizarin crimson.
– origin mid 19th cent.: from French alizarine, from alizari ‘madder’, from Arabic al-‘iṣāra ‘pressed juice’, from ‘aṣara ‘to press fruit’.

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