aetheogam

Etymology
From +.

Noun

 * 1)  A cryptogam; a plant of the obsolete taxonomic class Cryptogamia, having neither stamina nor pistils, and therefore no proper flowers, such as an alga, fern, fungus, lichen or moss.

Usage notes

 * Being derived from the two vowels (alpha-eta: aē), rather than the diphthong  (alpha-iota: ai), the initial ae- of aetheogam can only properly be written as two separate letters (ae), with a diaeresis atop the e (as ) being optional; the spellings *ætheogam and *etheogam are, therefore, erroneous.