bry·an·thus \brīˈan(t)thəs\noun Etymology: New Latin, from bry- + -anthus 1.capitalized: a genus of Old World prostrate mat-forming evergreen heaths (family Ericaceae) with 4-parted flowers in racemes that was formerly included in Phyllodoce 2.pluralbryanthuses\-thəsə̇z\alsobryan·thi\-nˌthī\: any plant of the genus Bryanthus or sometimes of the genus Phyllodoce