Source : Webster's Revised Unabridged Dictionary (1913)

Geminate \Gem"i*nate\, v. t.
   To double. [R.] --B. Jonson.

Geminate \Gem"i*nate\, a. [L. geminatus, p. p. of genimare to
   double. See {Gemini}.] (Bot.)
   In pairs or twains; two together; binate; twin; as, geminate
   flowers. --Gray.

Source : WordNet®

geminate
     n : a doubled or long consonant; "the `n' in `thinness' is a
         geminate"
     v 1: form by reduplication; "The consonant reduplicates after a
          short vowel"; "The morpheme can be reduplicated to
          emphasize the meaning of the word" [syn: {reduplicate}]
     2: occur in pairs [syn: {pair}]
     3: arrange in pairs; "Pair these numbers" [syn: {pair}]
     4: arrange or combine in pairs; "The consonants are geminated
        in these words"