spekboom
Concise Oxford English Dictionary © 2008 Oxford University Press:
spekboom /ˈspɛkbʊəm/
▶noun a South African shrub with succulent leaves, which is used for fodder during times of drought. [Portulacaria afra.]
– origin C19: from Afrik., from spek ‘bacon’ + boom ‘tree’.
'spekboom' also found in these Oxford entries:

