v /ˈvi/
 字母v
 V
 1. V, the twenty-second letter of the English alphabet, is a vocal consonant. V and U are only varieties of the same character, U being the cursive form, while V is better adapted for engraving, as in stone. The two letters were formerly used indiscriminately, and till a comparatively recent date words containing them were often classed together in dictionaries and other books of reference (see U). The letter V is from the Latin alphabet, where it was used both as a consonant (about like English w) and as a vowel. The Latin derives it from a form (V) of the Greek vowel Υ (see Y), this Greek letter being either from the same Semitic letter as the digamma F (see F), or else added by the Greeks to the alphabet which they took from the Semitic. Etymologically v is most nearly related to u, w, f, b, p; as in vine, wine; avoirdupois, habit, have; safe, save; trover, troubadour, trope. See U, F, etc.
 See Guide to Pronunciation, § 265; also §§ 155, 169, 178-179, etc.
 2. As a numeral, V stands for five, in English and Latin.
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 v
      adj : being one more than four [syn: five, 5]
      n 1: a unit of potential equal to the potential difference
           between two points on a conductor carrying a current of
           1 ampere when the power dissipated between the two
           points is 1 watt; equivalent to the potential difference
           across a resistance of 1 ohm when 1 ampere of current
           flows through it [syn: volt]
      2: a soft silvery white toxic metallic element used in steel
         alloys; it occurs in several complex minerals including
         carnotite and vanadinite [syn: vanadium, atomic number
         23]
      3: the cardinal number that is the sum of four and one [syn: five,
          5, cinque, quint, quintet, fivesome, quintuplet,
          pentad, fin, Phoebe, Little Phoebe]
      4: the 22nd letter of the Roman alphabet