Karwinskia
noun
Kar·win·skia
| \ kär-ˈwinz-kē-ə
\
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Medical Definition of Karwinskia
: a genus of shrubs or small trees (family Rhamnaceae) that are chiefly native to Mexico and the southwestern United States, have flowers with small hooded short-clawed petals and fleshy drupes, and include one (K. humboldtiana) with a fruit that has been known to poison birds (as domestic chickens)