What does hydrogen atom mean?
What does hydrogen atom mean?. The world's largest and most trusted free online dictionary: definitions, synonyms, word origins, example sentences, word games, and more.
What does hydrogen atom mean? - The Free Dictionary
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hydrogen atom |
hydrogen atom - The Free Dictionary
Other vocabulary
hydrogen, hydrogen atom, hydrogen azide, hydrogen bomb, hydrogen bond, hydrogen bromide, hydrogen carbonate, hydrogen chloride, hydrogen cyanide, hydrogen fluoride, hydrogen iodide, hydrogen ion, hydrogen ion concentration, hydrogen peroxide, hydrogen sulfide, hydrogen-bomb, hydrogenate, hydrogenation, atom, atom bomb, atom smasher, atom-bomb, atomic, atomic bomb, atomic clock, atomic cocktail, atomic energy, atomic energy commission, atomic explosion, atomic mass, atomic mass unit, atomic number, atomic number 1, atomic number 10, atomic number 100, atomic number 101, atomic number 102, atomic number 103, atomic number 104, atomic number 105, atomic number 106, atomic number 107, atomic number 108, atomic number 109, atomic number 11, atomic number 110, atomic number 111, atomic number 112
Dictionaries
Dictionary
A dictionary is a listing of lexemes from the lexicon of one or more specific languages, often arranged alphabetically (or by consonantal root for Semitic languages or radical and stroke for ideographic languages), which may include information on definitions, usage, etymologies, pronunciations, translation, etc. It is a lexicographical reference that shows inter-relationships among the data.
A broad distinction is made between general and specialized dictionaries. Specialized dictionaries include words in specialist fields, rather than a complete range of words in the language. Lexical items that describe concepts in specific fields are usually called terms instead of words, although there is no consensus whether lexicology and terminology are two different fields of study. In theory, general dictionaries are supposed[citation needed] to be semasiological, mapping word to definition, while specialized dictionaries are supposed to be onomasiological, first identifying concepts and then establishing the terms used to designate them. In practice, the two approaches are used for both types. There are other types of dictionaries that do not fit neatly into the above distinction, for instance bilingual (translation) dictionaries, dictionaries of synonyms (thesauri), and rhyming dictionaries. The word dictionary (unqualified) is usually understood to refer to a general purpose monolingual dictionary.
There is also a contrast between prescriptive or descriptive dictionaries; the former reflect what is seen as correct use of the language while the latter reflect recorded actual use. Stylistic indications (e.g. "informal" or "vulgar") in many modern dictionaries are also considered by some to be less than objectively descriptive.
The first recorded dictionaries date back to Sumerian times around 2300 BCE, in the form of bilingual dictionaries, and the oldest surviving monolingual dictionaries are Chinese dictionaries c. 3rd century BCE. The first purely English alphabetical dictionary was A Table Alphabeticall, written in 1604, and monolingual dictionaries in other languages also began appearing in Europe at around this time. The systematic study of dictionaries as objects of scientific interest arose as a 20th-century enterprise, called lexicography, and largely initiated by Ladislav Zgusta. The birth of the new discipline was not without controversy, with the practical dictionary-makers being sometimes accused by others of having an "astonishing" lack of method and critical-self reflection.
