guil·le·met 
(gĭlə-mĕt′, gē-ə-mĕ)
(gĭlə-mĕt′, gē-ə-mĕ)n.
Either of a pair of punctuation marks («) or (») used in some languages, such as French and Russian, to mark the beginning and end of a quotation.
[French, diminutive of Guillaume, William (the name of its supposed inventor).]