pter·i·do·spermaphyta \|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