Myxoedema \Myx`oe*de"ma\, n. [NL. fr. Gr. ? mucus + oedema.] (Med.) A disease producing a peculiar cretinoid appearance of the face, slow speech, and dullness of intellect, and due to failure of the functions of the thyroid gland. [Also spelled {myxedema}.]-- {Myx`oe*dem"a*tous}, a., {Myx`oe*dem"ic}, a. [Webster 1913 Suppl.]