What does angiospermous mean?
"Angiospermous" is a technical adjective used in botany to describe plants that belong to the angiosperms — the vast group of flowering plants whose seeds develop inside an ovary, a protective vessel within the flower. The term derives from Greek roots: "angeion," meaning vessel or container, and "sperma," meaning seed, so it literally conveys the idea of "seed-bearing within a vessel." Angiospermous plants dominate the modern plant world, encompassing everything from grasses and orchids to oaks and roses, and their enclosed-seed strategy is one of the key evolutionary innovations distinguishing them from gymnosperms such as pines, whose seeds lie exposed on cone scales. In practice, the word appears mainly in textbooks, field guides, and scholarly papers rather than everyday conversation, where simpler terms like "flowering" are preferred. For students of biology, however, mastering "angiospermous" signals precision when discussing plant classification and reproductive structures.
adjectiveBelonging or relating to the angiosperms, the class of seed-bearing plants whose ovules are enclosed within an ovary and which produce flowers.
- (Of a plant or group of plants) belonging to the angiosperms; producing flowers and bearing seeds enclosed within an ovary.
"The orchid is an angiospermous plant, its seeds developing safely inside an ovary."
"Roughly ninety percent of green plant species are angiospermous, from towering oaks to tiny duckweeds."
"The botanist classified the fossil specimen as angiospermous based on traces of enclosed seeds."
Every fruit you've ever eaten came from an angiospermous plant — the word literally means 'seed in a vessel.'
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of angiospermous
The word combines two Greek elements: "angeion" (vessel or case) and "sperma" (seed), reflecting the defining trait of flowering plants — seeds enclosed within an ovary. It was coined in the nineteenth century as botanists formalized the division between angiosperms and gymnosperms, whose exposed seeds gave rise to the contrasting term built on "gymnos" (naked). Related English words sharing the "sperma" root include "sperm," "gymnosperm," and "diaspora" (a scattering of seeds, literally or figuratively).
How angiospermous is actually used
A technical term used almost exclusively in botany and scientific writing; it is rarely heard in everyday speech, where 'flowering' serves as the common equivalent.
Easily confused with angiospermous
Gymnospermous describes plants whose seeds are not enclosed in an ovary (as in conifers), whereas angiospermous describes flowering plants with enclosed seeds.