poison ash
Học thuậtThân thiện
Definition
Noun: * A smooth American swamp shrub (Toxicodendron vernix) with pinnate leaves, greenish flowers, and greenish-white berries that yields an irritating oil. It is also commonly known as poison sumac.
Usage Notes
- "Poison ash" is the common name for a specific plant species. It is used as a singular, countable noun (e.g., , ).
- This term is primarily used in botanical contexts and in regions of North America where the plant is native, particularly to warn of its hazardous properties.
- The plant is notorious for causing severe allergic skin reactions (contact dermatitis) similar to those caused by poison ivy and poison oak, due to the oil urushiol.
Examples
- Noun:
- Hikers should learn to identify poison ash to avoid a painful rash.
- The wetland area is dense with poison ash shrubs.
- Touching poison ash can result in a severe allergic reaction.
Advanced Usage
- The term can be used attributively (like an adjective) to describe related concepts.
- He suffered from a severe poison ash rash after clearing the brush.
Variants and Related Words
- Poison sumac (n): The more frequently used common name for the same plant ().
- Poison dogwood (n): Another, less common, synonym for poison ash/poison sumac.
- Toxicodendron vernix (n): The formal botanical/scientific name.
Synonyms
- Poison sumac
- Poison dogwood
- Swamp sumac
Related Phrases/Idioms
- (As) dangerous as poison ash: Used figuratively to describe something or someone that is highly irritating or causes trouble.
- That political issue is as dangerous as poison ash; everyone who touches it gets hurt.
Noun
- smooth American swamp shrub with pinnate leaves and greenish flowers followed by greenish white berries; yields an irritating oil