[1] : The Collaborative International Dictionary of English v.0.48

monovular \monovular\ adj. biol.
   derived from a single egg or ovum; -- of twins; as, identical
   twins are monovular. contrasted with fraternal.

   syn: identical.
        wordnet 1.5
see also:
fraternal 

[2] : WordNet (r) 2.0

monovular
     adj : of twins derived from a single egg or ovum; "identical
           twins are monovular" syn: identical ant: fraternal
see also:
identical fraternal 

Monovular >> M Words
Monovular, definition of term: Monovular
monovular_pag1.html