Gymnosperms are a group of plants that produce seeds without enclosing them in a fruit. These trees and shrubs are characterized by their naked seeds and needle-like leaves. The term "gymnosperm" comes from the Greek word "gymnos" meaning naked and "sperma" meaning seed. There are several synonyms for the word "gymnosperm" including conifer, evergreen, non-flowering plant, pine, and spruce. The conifer is one of the most common types of gymnosperms and is known for its cone-shaped structure. Other popular gymnosperms include firs, cypress, and junipers. These plants play an essential role in ecosystems by providing shelter and food for various animals and insects.