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From Latin rubia (madder), from rubeus (red).


rubiacin (uncountable)

  1. (organic chemistry) A substance found in madder root, and probably identical with ruberythrinic acid.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for rubiacin in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)