bourtree
noun
bour·tree
| \ ˈbu̇(ə)r-(ˌ)trē
, ˈbȯ(ə)r-
\
, ˈbȯ(ə)r-
\
Medical Definition of bourtree
British
: a large Eurasian black-fruited elderberry (Sambucus nigra) formerly valued as a source of dyestuffs and of several folk remedies