White alder Meaning, Definition & Usage

  1. noun tree of western United States
    mountain alder; Alnus rhombifolia.
  2. noun shrub of eastern and southern coastal United States having beautiful racemes of spice-scented white flowers
    sweet pepperbush; Clethra alnifolia; summer sweet; pepper bush.

WordNet

Definitions
  1. . (Bot.) See Sweet pepper bush, under Pepper.

Webster 1913