angiosperm

noun

an·​gio·​sperm ˈan-jē-ə-ˌspərm How to pronounce angiosperm (audio)
plural angiosperms
: any of a class (Angiospermae) of vascular plants that have male and female reproductive structures enclosed in a flower, that have seeds which arise from ovules contained in the ovaries, and that produce dry or fleshy fruits after double fertilization : flowering plant
Angiosperms … have their ovules consistently enclosed in a carpel, which prevents direct access of pollen to the ovules.P. Barry Tomlinson
Perhaps such habitats even antedate the appearance of angiosperm plants, which first flourished on a large scale in the Cretaceous period …Michael Goulding
compare gymnosperm
angiospermous adjective
angiospermous plant species
angiospermy noun
Angiospermy is a key innovation in angiosperms. It does not occur in other plant groups. The ovules are completely enclosed in a carpel. Peter K. Endress and Anton Igersheim

Examples of angiosperm in a Sentence

Recent Examples on the Web Today, nearly 80 percent of all terrestrial plants are angiosperms. Jack Tamisiea, New York Times, 12 Sep. 2023 This finding highlights how resilient angiosperms have been over hundreds of millions of years. Jamie Thompson, Discover Magazine, 15 Sep. 2023 Flowering plants are known to scientists as angiosperms. Jack Tamisiea, New York Times, 12 Sep. 2023 And the roses are an not unusual angiosperm (flowering plant) lineage in this regard. Jamie Thompson, Discover Magazine, 15 Sep. 2023 To uncover the evolutionary insights missing from the fossil record, the researchers analyzed two evolutionary trees containing more than 100,000 species of living angiosperms. Jack Tamisiea, New York Times, 12 Sep. 2023 By contrast, eight centuries is extremely old for an oak, an angiosperm. Jared Farmer, Smithsonian Magazine, 3 Jan. 2023 Such is the case with the first angiosperm, which researchers estimate evolved between 140 million and 250 million years ago. Gemma Tarlach, Discover Magazine, 1 Aug. 2017 The team found that, as with the outer seed coat in modern angiosperm seeds, the cupule tissue curved around the developing seeds. Elizabeth Pennisi, Science | AAAS, 26 May 2021 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'angiosperm.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

borrowed from French angiosperme "angiospermous plant," noun derivative of angiosperme "angiospermous," borrowed from New Latin angiospermus "having seeds contained in a capsule, having a pericarp," from Greek angeîon "vessel, container" + -o- -o- + -spermos "having a seed (of the kind specified)," derivative of spérma "seed" — more at angio-, sperm

First Known Use

circa 1828, in the meaning defined above

Time Traveler
The first known use of angiosperm was circa 1828

Dictionary Entries Near angiosperm

Cite this Entry

“Angiosperm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/angiosperm. Accessed 29 Feb. 2024.

Kids Definition

angiosperm

noun
an·​gio·​sperm ˈan-jē-ə-ˌspərm How to pronounce angiosperm (audio)
angiospermous adjective

Medical Definition

angiosperm

noun
an·​gio·​sperm ˈan-jē-ə-ˌspərm How to pronounce angiosperm (audio)
: any of a class (Angiospermae) of plants (as oaks or roses) that have reproductive structures contained in flowers and seeds enclosed in ovaries compare gymnosperm
angiospermous adjective

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