lüˈkäbrēəm noun
Usage: capitalized
Etymology: New Latin, from leuc- + -bryum (from Greek bryon moss) — more at bry-
: a genus of mosses that is related to Dicranum though sometimes made type of a separate family and is characterized by a tufted habit of growth resulting in the formation of thick cushiony masses and by great reduction in chlorophyll with many void cells resulting in a dull grayish white or greenish white coloration of the plant — see white moss