aëtheogam

from The Century Dictionary.

• noun In De Candolle's system of classification, a plant belonging to a group of cryptogams which were the only ones of the order then known to have sexual organs, including the Equisetaceæ, Filices, Musci, higher Hepaticæ, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Alternative spelling of aetheogam.