gnetal adjective 1noun 1forms 1 adjective1 •Of or pertaining to the species of the order Gnetales.As we already have had occasion to remark for the gnetal and casuarinal alliances, a ½ floral symmetry is evidently an ancient one for that phylum. — 1918 noun1 •Any species of the order Gnetales of relict gymnosperms. formsgnetals
