Guillemets

Guillemets (pronounced /ˈɡɪləmɛt/, or /ɡiːəˈmeɪ/ after French [ɡijmɛ]), also called angle quotes, are line segments, pointed as if arrows (« or »), sometimes forming a complementary set of punctuation marks used as a form of quotation mark. The symbol at either end — double « and » or single ‹ and › — is a guillemet. They are used in a number of languages to indicate speech. They are also referred to as symbols for rewind and fast forward.

Source: http://en.wikipedia.org/wiki/Guillemets