|terə(ˌ)dō+ noun plural
Usage: capitalized
Etymology: New Latin, from pterid- + Spermaphyta
in some classifications : a group of fossil plants coextensive with the order Cycadofilicales but treated as coordinate with Gymnospermae and Angiospermae
• pter·i·do·sper·ma·phyt·ic | ̷ ̷ ̷ ̷(ˌ) ̷ ̷|spərmə|fid.ik adjective
• pter·i·do·sper·mous -məs adjective