Definition of white cedar:
(n) :
An evergreen coniferous tree, of species (Thuja occidentalis, native to the northeastern US and southeastern Canada.
(n) :
An Atlantic white cypress, Chamaecyparis thyoides.
(n) :
In family Cupressaceae (gymnosperms)
(n) :
A Mexican white cedar (Cupressus lusitanica)
(n) :
Among angiosperms:
(n) :
A chinaberry shrub (Melia azedarach), in family Meliaceae.