-ˌbōm, -ˌbüm noun
Usage: often capitalized K
Etymology: part translation of Afrikaans kafferboom, from Kaffer Kaffir + boom tree, from Dutch, from Middle Dutch; akin to Old English bēam tree — more at beam
Africa : coral tree ; especially : a coral tree ( Erythrina caffra ) with scarlet flowers and light soft wood sometimes used for fence posts or shingles