Definition of white dogwood in US English:

white dogwood

noun

  • 1The dogwood Cornus florida, of eastern North America, which has large, white, flower-like bracts, or the wood of this tree; (in early use also) †an American dogwood having leaves with white, downy undersides (not identified) (obsolete).

  • 2The Jamaica dogwood Piscidia piscipula, or the wood of this tree (now rare).

Origin

Early 19th century; earliest use found in Amos Eaton (1776–1842).