frankincense
Concise Oxford English Dictionary © 2008 Oxford University Press:
frankincense /ˈfraŋkɪnsɛns/
▶noun an aromatic gum resin obtained from an African tree (Boswellia sacra) and burnt as incense.
– origin ME: from OFr. franc encens, lit. ‘high-quality incense’, from franc (see frank1) in an obs. sense ‘of high quality’ + encens ‘incense’.
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