a·liz·a·rin (ə-lĭzər-ĭn) also a·liz·a·rine (-ĭn, -ə-rēn′)
An orange-red crystalline compound, C14H8O4, used as an acid-base indicator and in making dyes.
[French alizarine, from alizari, madder root, from Spanish, probably from Arabic al-'uṣāra, the juice : al-, the + 'uṣāra, juice (from 'aṣara, to squeeze; see ʿṣr in the Appendix of Semitic roots).]
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Indo-European & Semitic Roots Appendices
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