soapbark

noun

soap·​bark ˈsōp-ˌbärk How to pronounce soapbark (audio)
: 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

Examples of soapbark in a Sentence

Recent Examples on the Web Its adjuvant, called AS01, is derived from the Chilean soapbark tree and has also been used at a higher dose in the company's Shingrix vaccine. Alexander Tin, CBS News, 3 May 2023 The soapbark tree is native to Chile. Bruce Y. Lee, Forbes, 15 July 2022 In fact, the AS01B adjuvant in the Shingrix vaccine (the recombinant herpes zoster vaccine to prevent Shingles) includes QS-21, which is also extracted from the Chilean soapbark tree. Bruce Y. Lee, Forbes, 15 July 2022 Matrix-M relies on quillaja extract from soapbark trees. Sarah Jane Tribble, baltimoresun.com, 19 July 2021 Matrix-M is made from the bark of the soapbark tree, which is abundant in Chile. Justin Meneguzzi, National Geographic, 13 Nov. 2020 Though the company has deemed the soapbark adjuvant as safe, it has not yet been evaluated as part of a final product submitted to the U.S. Food and Drug Administration. Justin Meneguzzi, National Geographic, 13 Nov. 2020 The rare Chilean soapbark tree produces compounds that can help boost the body’s reaction to vaccines. Brendan Borrell, The Atlantic, 21 Oct. 2020 This was it: a Chilean soapbark, one of a handful planted on the Berkeley campus starting in the late 1800s. Brendan Borrell, The Atlantic, 21 Oct. 2020

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'soapbark.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1861, in the meaning defined above

Time Traveler
The first known use of soapbark was in 1861

Dictionary Entries Near soapbark

Cite this Entry

“Soapbark.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/soapbark. Accessed 24 Jul. 2024.

Medical Definition

soapbark

noun
soap·​bark ˈsōp-ˌbärk How to pronounce soapbark (audio)
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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