2 definitions
for Althaea
From The Collaborative International Dictionary of English v.0.48 :
Althaea \Al*th[ae]"a\, Althea \Al*the"a\, n. [althaea, Gr. ?.]
(Bot.)
(a) A genus of plants of the Mallow family. It includes the
officinal marsh mallow, and the garden hollyhocks.
(b) An ornamental shrub ({Hibiscus Syriacus) of the Mallow
family.
[1913 Webster]
From WordNet (r) 2.0 :
althaea
n : any of various plants of the genus Althaea; similar to but
having smaller flowers than genus Alcea [syn: althea, hollyhock]