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Search result for valence (4 entries) (3.2714 seconds)
ลองค้นหาคำในรูปแบบอื่นๆ เพื่อให้ได้ผลลัพธ์มากขึ้นหรือน้อยลง: -valence-, *valence*.

Result from Foreign Dictionaries (4 entries found)

From The Collaborative International Dictionary of English v.0.48 [gcide]: Valance \Val"ance\, n. [Perhaps fr. OF. avalant descending, hanging down, p. pr. of avaler to go down, let down, descend (cf. {Avalanche}); but probably from the town of Valence in France.] [1913 Webster] 1. Hanging drapery for a bed, couch, window, or the like, especially that which hangs around a bedstead, from the bed to the floor. [Written also {valence}.] [1913 Webster] Valance of Venice gold in needlework. --Shak. [1913 Webster] 2. The drooping edging of the lid of a trunk, which covers the joint when the lid is closed. [1913 Webster] From The Collaborative International Dictionary of English v.0.48 [gcide]: Valence \Va"lence\, n. [From L. valens, -entis, p. pr. of valere to have power, to be strong. See {Valiant}.] (Chem.) The degree of combining power of an atom (or radical) as shown by the number of atoms of hydrogen (or of other monads, as chlorine, sodium, etc.) with which it will combine, or for which it can be substituted, or with which it can be compared; thus, an atom of hydrogen is a monad, and has a valence of one; the atoms of oxygen, nitrogen, and carbon are respectively dyads, triads, and tetrads, and have a valence respectively of two, three, and four. [1913 Webster] Note: The valence of certain elements varies in different compounds. Valence in degree may extend as high as seven or eight, as in the cases of iodine and osmium respectively. The doctrine of valence has been of fundamental importance in distinguishing the equivalence from the atomic weight, and is an essential factor in explaining the chemical structures of compounds. [1913 Webster] From WordNet (r) 3.0 (2006) [wn]: valence n 1: (biology) a relative capacity to unite or react or interact as with antigens or a biological substrate [syn: {valence}, {valency}] 2: (chemistry) a property of atoms or radicals; their combining power given in terms of the number of hydrogen atoms (or the equivalent) [syn: {valence}, {valency}] From French-English Freedict dictionary [fd-fra-eng]: Valence [valãs] Valencia

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