Définitions
1.NounA 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.
2.Noun1 2 John A. Simpson and Edmund S. C. Weiner, editors (1989), “aetheogam”, in The Oxford English Dictionary, 2nd edition, Oxford: Clarendon Press, →ISBN.