any seedless, nonflowering vascular plant of the class Filicinae, of tropical to temperate regions, characterized by true roots produced from a rhizome, triangular fronds that uncoil upward and have a branching vein system, and reproduction by spores contained in sporangia that appear as brown dots on the underside of the fronds.
- fernless, adjective
- fernlike, adjective
Other definitions for Fern (2 of 2)
a female given name.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use fern in a sentence
Maintaining the high caliber of guest to which his viewers have become accustomed, Galifianakis welcomes Brad Pitt to the ferns.
They did a bunch of pro-Obamacare videos, including the famous “Between Two Ferns” sketch with President Obama.How Funny or Die Plans to Cover ISIS, Ebola and Elections | Asawin Suebsaeng | October 10, 2014 | THE DAILY BEAST
Zach Galifianakis invited the president to chat on his Internet talk show “Between Two Ferns,” and boy, did Obama sass Zach back.Obama ‘Between Two Ferns,’ Kevin Bacon, Baby Tigers and More Viral Videos | Ariana Dickey | March 15, 2014 | THE DAILY BEAST
Or, more specifically, President Obama appearing on the humorous Zach Galifianakis web series, “Between Two Ferns.”
Best Moment: When Ben Stiller attempts to destroy the "Two Ferns" set.Justin Bieber, Jon Hamm & the Best of 'Between Two Ferns' (VIDEO) | Anna Klassen | September 26, 2013 | THE DAILY BEAST
Many British Ferns evidence a marked tendency to “sport,” and this is a fact which the beginner should always bear in mind.
It goes without saying that Ferns of all kinds are interesting plants to grow in the garden and house.
Of course it is only the hardiest Ferns which can be expected to grow well in the town garden.
One wonders why even some of the common British Ferns are not more generally cultivated in rooms.
A few small rocks of some soft stone may be added, and in between these the Ferns are planted.
British Dictionary definitions for fern
any tracheophyte plant of the phylum Filicinophyta, having roots, stems, and fronds and reproducing by spores formed in structures (sori) on the fronds: See also tree fern
any of certain similar but unrelated plants, such as the sweet fern
- fernlike, adjective
- ferny, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for fern
Any of numerous seedless vascular plants belonging to the phylum Pterophyta that reproduce by means of spores and usually have feathery fronds divided into many leaflets. Most species of ferns are homosporous (producing only one kind of spore). The haploid spore grows into a small, usually flat gametophyte known as a prothallus, which is undifferentiated into roots, stems, and leaves. The green prothallus anchors itself with hairlike extensions known as rhizoids and bears both archegonia (organs producing female gametes) and antheridia (organs producing male gametes). The male gametes require the presence of water to swim to the female gametes and fertilize the eggs. Normally only one embryo is produced, and it then grows out of the gametophyte plant as a diploid sporophyte plant that has roots, stems, and leaves and conducts photosynthesis, while the smaller gametophyte withers away. The leaves of these sporophytes eventually produce sporangia (in some species occurring in clusters known as sori). Under dry conditions, the sori burst releasing hundreds of thousands or millions of spores. Ferns were abundant in the Carboniferous period and exist today in about 11,000 species, about three-quarters of which live in tropical climates.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.