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any inland stream of water smaller than a river (other terms: UK: rill, gill; N. Eng. & Scot.: burn; Eng. & New Eng.: brook; Midland US: run) crew body of people manning a vehicle of any kind gang of manual workers (e.g. road crew) group of friends or colleagues ("I saw him and his crew at the bar") rowing as a sport crib (n.)
A thesaurus (pl.: thesauri or thesauruses), sometimes called a synonym dictionary or dictionary of synonyms, is a reference work which arranges words by their meanings (or in simpler terms, a book where one can find different words with similar meanings to other words), [1] [2] sometimes as a hierarchy of broader and narrower terms, sometimes simply as lists of synonyms and antonyms.
The word poecilonym is a rare synonym of the word synonym. It is not entered in most major dictionaries and is a curiosity or piece of trivia for being an autological word because of its meta quality as a synonym of synonym. Antonyms are words with opposite or nearly opposite meanings. For example: hot ↔ cold, large ↔ small, thick ↔ thin ...
Various definitions of pollution exist, which may or may not recognize certain types, such as noise pollution or greenhouse gases.The United States Environmental Protection Administration defines pollution as "Any substances in water, soil, or air that degrade the natural quality of the environment, offend the senses of sight, taste, or smell, or cause a health hazard.
A pollutant or novel entity [1] is a substance or energy introduced into the environment that has undesired effect, or adversely affects the usefulness of a resource. These can be both naturally forming (i.e. minerals or extracted compounds like oil) or anthropogenic in origin (i.e. manufactured materials or byproducts).
It is a sister site to The Free Dictionary and usage examples in the form of "references in classic literature" taken from the site's collection are used on The Free Dictionary 's definition pages. In addition, double-clicking on a word in the site's collection of reference materials brings up the word's definition on The Free Dictionary.
absorption - one substance taking in another, either physically or chemically. acclimation - the process of an organism adjusting to chronic change in its environment. acid mine drainage - the outflow of acidic water from metal mines or coal mines. acid rain - rain or other forms of precipitation that is unusually acidic.
Toxicity or other hazards do not imply an environmental hazard, because elimination by sunlight , water or organisms (biological elimination) neutralizes many reactive or poisonous substances. Persistence towards these elimination mechanisms combined with toxicity gives the substance the ability to do damage in the long term.