althaea
nounMedical Definition of althaea
1
capitalized
: a genus of Old World herbs of the mallow family that have terminal spikelike clusters of showy flowers and include the hollyhock and marshmallow
2
or althea
: the dried root of the marshmallow deprived of its brown corky layer and small roots and used as a demulcent and emollient
— called also marshmallow root