What does this line of of code mean?

Can someone explain what the colon does here:

Code:

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template<class T> class Vec : public vector<t> { ...

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Thanks!

i used in inheritance for C++ classes so that

class Vec : public vector

means class 'Vec' Inherits all of class 'vectors' member functions, member variables, ect ect..

do a search on http://www.google.com on C++ class or C++ inheritance or get a book on C++ for a much better and more indepth explaination.