gymnosperm

noun

gym·​no·​sperm ˈjim-nə-ˌspərm 

plural gymnosperms

: any of a class (Gymnospermae) of vascular plants that produce seeds not enclosed in an ovary, possess separate male and female reproductive strobili, and include the conifers, cycadophytes, gnetophytes, and gingko

Note: While separate male and female strobili typically occur on the same plant, some gymnosperms (such as the gingko) are dioecious, with male and female strobili on different individual plants.

… gymnosperms are an ancient group of plants, showing up about 380 million years ago.

—John Nelson

Gymnosperm pollen is spread largely by the wind, the sperm-like dust of one plant blowing along until it reaches the egg-like ovule of another …

—Natalie Angier

compare angiosperm

gymnospermous

ˌjim-nə-ˈspər-məs 

adjective

gymnospermous plants

gymnospermy

ˈjim-nə-ˌspər-mē 

noun

… transition from gymnospermy, in which pollen grains (sperm donors) land directly on ovules (egg donors), to angiospermy, in which they land on the tip of the carpels.

—Julien B. Bachelier

Examples of gymnosperm in a Sentence

Recent Examples on the Web

This gymnosperm is found in arid Namibia and Angola and only grows two strap-like leaves during its very long lifetime. —Kristin Guy, Sunset Magazine, 30 Sep. 2024

In gymnosperm trees, which are usually softwoods like pine or cedar, the microfibrils measure 29 nanometers on average. —Michael Franco, New Atlas, 31 July 2024

Cycads are gymnosperms, a group that includes conifers and ginkgos. —Laura Cinti, Ars Technica, 16 June 2024

But this recently discovered preserved pollen came from non-flowering gymnosperms, a group of seed-producing plants that includes conifers such as pine, fir and spruce trees. —Will Sullivan, Smithsonian Magazine, 6 Mar. 2023

Roughly 25 gymnosperm species can live 1,000 years or longer. —Jared Farmer, Smithsonian Magazine, 3 Jan. 2023

After the crisis, the dominant seedless ferns were supplanted by seed-bearing gymnosperms such as conifers and ginkgoes. —National Geographic, 18 Dec. 2019

Yet, once angiosperms emerged, their structural and functional diversity exploded — far outpacing the diversification and spread of the other major plant groups, the gymnosperms (including conifers) and ferns. —Quanta Magazine, 16 June 2019

Word History

Etymology

ultimately from Greek gymnos + sperma seed — more at sperm

First Known Use

1804, in the meaning defined above

Kids Definition

gymnosperm

noun

gym·​no·​sperm ˈjim-nə-ˌspərm 

: any of a group of woody nonflowering vascular plants (as pines, yews, and gingkos) that produce naked seeds not enclosed in a true fruit

Medical Definition

gymnosperm

noun

gym·​no·​sperm ˈjim-nə-ˌspərm 

: any of a class (Gymnospermae) of plants (as conifers or cycads) that produce seeds not enclosed in an ovary and possess separate male and female reproductive structures compare angiosperm

gymnospermous

ˌjim-nə-ˈspər-məs 

adjective