1.the 14th letter of the Roman alphabet
2.(of a solution) concentration expressed in gram equivalents of solute per liter
3.a unit of force equal to the force that imparts an acceleration of 1 m/sec/sec to a mass of 1 kilogram; equal to 100,000 dynes
4.the cardinal compass point that is at 0 or 360 degrees
5.a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues
1.(MeSH)Enzymes that catalyze the transfer of N-acetylglucosamine from a nucleoside diphosphate N-acetylglucosamine to an acceptor molecule which is frequently another carbohydrate. EC 2.4.1.-.
1.(MeSH)Enzymes that catalyze the transfer of N-acetylgalactosamine from a nucleoside diphosphate N-acetylgalactosamine to an acceptor molecule which is frequently another carbohydrate. EC 2.4.1.-.
1.(MeSH)Enzymes that catalyze the transfer of N-acetylhexosaminyl groups to an acceptor molecule which is frequently another carbohydrate. EC 2.4.1.
NN (ĕn), the fourteenth letter of English alphabet, is a vocal consonent, and, in allusion to its mode of formation, is called the dentinasal or linguanasal consonent. Its commoner sound is that heard in ran, done; but when immediately followed in the same word by the sound of g hard or k (as in single, sink, conquer), it usually represents the same sound as the digraph ng in sing, bring, etc. This is a simple but related sound, and is called the gutturo-nasal consonent. See Guide to Pronunciation, §§ 243-246.
The letter N came into English through the Latin and Greek from the Phœnician, which probably derived it from the Egyptian as the ultimate origin. It is etymologically most closely related to M. See M.
NN, n. (Print.) A measure of space equal to half an M (or em); an en.
definition of Wikipedia
atom; chemical element[Classe]
liste de gaz (fr)[Thème]
Descripteurs EUROVOC (fr)[Thème]
N-Acetylgalactosaminyltransferases (n.) [MeSH]
N-Acetylglucosaminyltransferases (n.) [MeSH]
N-Acetylhexosaminyltransferases (n.) [MeSH]
|ISO basic Latin alphabet|
One of the most common hieroglyphs, snake, was used in Egyptian writing to stand for a sound like the English ⟨J⟩, because the Egyptian word for "snake" was djet. It is speculated that Semitic people working in Egypt adapted hieroglyphics to create the first alphabet, and that they used the same snake symbol to represent N, because their word for "snake" may have begun with that sound. However, the name for the letter in the Phoenician, Hebrew, Aramaic and Arabic alphabets is nun, which means "fish" in some of these languages. The sound value of the letter was /n/—as in Greek, Etruscan, Latin and all modern languages.
|Egyptian hieroglyph for N||Phoenician N||Etruscan N||Greek Nu|
N represents a dental or alveolar nasal in virtually all languages that use the Latin alphabet, and in the International Phonetic Alphabet. A common digraph with ⟨n⟩ is ⟨ng⟩, which represents a velar nasal in a variety of languages, usually positioned word-finally in English. Often, before a velar plosive (as in ink or jungle), ⟨n⟩ alone represents a velar nasal. In languages like Italian and French, ⟨gn⟩ represents a palatal nasal (/ɲ/). The Portuguese and Vietnamese spelling for this sound is ⟨nh⟩ (while Spanish and a few other languages use the letter ⟨ñ⟩). In English, ⟨n⟩ is generally silent when it is preceded by an ⟨m⟩ at the end of words, as in hymn; however, ⟨n⟩ is pronounced in this combination when occurring word medially, as in hymnal.
|Unicode name||LATIN CAPITAL LETTER N||LATIN SMALL LETTER N|
|Numeric character reference||N||N||n||n|
1 and all encodings based on ASCII, including the DOS, Windows, ISO-8859 and Macintosh families of encodings.
Letter N with diacritics
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Lettris is a curious tetris-clone game where all the bricks have the same square shape but different content. Each square carries a letter. To make squares disappear and save space for other squares you have to assemble English words (left, right, up, down) from the falling squares.
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