A seed plant, also known as a spermatophyte, is a type of plant that reproduces through seeds. There are different synonyms that can be used to refer to seed plants, depending on the classification system used. Some common synonyms include phanerogams, gymnosperms, and angiosperms. A phanerogam is a plant that produces visible flowers and seeds. Gymnosperms are a group of plants that have naked seeds and reproduce through cones. Angiosperms, on the other hand, are flowering plants that produce seeds enclosed in a fruit. Another possible synonym for seed plants is spermatophyte, which means "seed plant" in Greek. Regardless of the term used, seed plants are important for their contribution to the ecosystem and as sources of food, medicine, and industrial materials.