vec·tor /ˈvɛktɚ/
 向量,向量,帶菌者(vt.)無線電導引
 vec·tor /ˈvɛktɚ/ 名詞
 矢量,帶菌體,傳病媒介,昆蟲媒介者
 vector
 向量
 Vec·tor n.
 1. Same as Radius vector.
 2. Math. A directed quantity, as a straight line, a force, or a velocity.  Vectors are said to be equal when their directions are the same and their magnitudes equal.  Cf. Scalar.
 Note: ☞ In a triangle, either side is the vector sum of the other two sides taken in proper order; the process finding the vector sum of two or more vectors is vector addition (see under Addition).
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 vector
      n 1: a variable quantity that can be resolved into components
      2: a straight line segment whose length is magnitude and whose
         orientation in space is direction
      3: any agent (person or animal or microorganism) that carries
         and transmits a disease; "mosquitos are vectors of malaria
         and yellow fever"; "fleas are vectors of the plague";
         "aphids are transmitters of plant diseases"; "when medical
         scientists talk about vectors they are usually talking
         about insects" [syn: transmitter]