soapbark

noun
soap·bark | \ˈsōp-ˌbärk \

Definition of soapbark 

: a Chilean tree (Quillaja saponaria) of the rose family with glossy leaves and terminal white flowers also : its saponin-rich bark used in cleaning and in emulsifying oils

First Known Use of soapbark

1861, in the meaning defined above

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The first known use of soapbark was in 1861

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soapbark

noun
soap·bark | \ˈsōp-ˌbärk \

Medical Definition of soapbark 

1 : a Chilean tree of the genus Quillaja (Q. saponaria) with shiny leaves and white flowers

2 : the saponin-rich bark of the soapbark tree used in cleaning and in emulsifying oil

called also quillaja

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