common ragweed
Definition
Noun: A North American annual plant (Ambrosia artemisiifolia) with finely divided, fern-like leaves and spikes of small green flowers. It is a widespread weed, often causing significant seasonal allergies due to its abundant wind-dispersed pollen.
Examples of Usage
- The fields were overrun with common ragweed, triggering hay fever symptoms in many people.
- Botanists study the spread of common ragweed as an invasive species in Europe.
- Identifying common ragweed is important for farmers trying to control it.
Advanced Usage
- As a subject of study: The plant is frequently discussed in contexts of ecology, allergy medicine, and invasive species biology.
- The research focused on the allergenic properties of common ragweed pollen.
- In a compound noun form: While "common ragweed" itself is the target term, it can be part of larger noun phrases.
- The common ragweed population has increased due to climate change.
Variants and Related Words
- Ragweed (n): The general name for plants in the genus . "Common ragweed" is a specific species.
- Ambrosia artemisiifolia (n): The scientific (Latin) name for common ragweed.
- Annual ragweed (n): Another common name, emphasizing its life cycle of germinating, flowering, and dying in one year.
Synonyms
- Bitterweed: A regional name sometimes used for ragweed.
- Hay-fever weed: A descriptive name highlighting its primary impact on humans.
Notes on Different Meanings
The term "common ragweed" has a single, specific botanical meaning. It does not have multiple distinct definitions like many common words. Its significance lies in its identity as a particular plant species with notable ecological and health impacts.
Noun
-
annual weed with finely divided foliage and spikes of green flowers; common in North America; introduced elsewhere accidentally
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