soap·bark (s p bärk )n. 1. A Chilean evergreen tree (Quillaja saponaria) of the rose family, having bark used as soap and as a source of saponin. 2. The bark of this tree. |
soapbark [ˈsəʊpˌbɑːk]
n
1. (Life Sciences & Allied Applications / Plants) Also called quillai a W South American rosaceous tree, Quillaja saponaria, with undivided evergreen leaves and small white flowers
2. (Life Sciences & Allied Applications / Forestry) Also called quillai bark the inner bark of this tree, formerly used as soap and as a source of saponin
3. (Life Sciences & Allied Applications / Plants) any of several trees or shrubs that have a bark similar to this
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