pteridosperm
/ˈtɛrɪdoʊˌspɜrm/
noun
- An extinct seed plant that had fern-like leaves, also known as a seed fern.
- Pteridosperms were common during the Carboniferous period.
- Fossils of pteridosperms show both fern-like leaves and seeds.
- Scientists study pteridosperms to understand the evolution of modern seed plants.