1 example sentence using gemination.
    Gemination used in a sentence
  
Gemination in a sentence as a noun
Edit: Forgot to include gemination marks here. Should be /e:/ and /o:/ above.
Gemination definitions
            noun
            
          the doubling of a word or phrase (as for rhetorical effect)
            noun
            
      the act of copying or making a duplicate (or duplicates) of something; "this kind of duplication is wasteful"
See also: duplication