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

acer \acer\ n.
   1. 1 type genus of the aceraceae; trees or shrubs having
      winged fruit.

   syn: genus acer
        wordnet 1.5

[2] : WordNet (r) 2.0

acer
     n : type genus of the aceraceae; trees or shrubs having winged
         fruit syn: genus acer
see also:
genus acer 

Acer >> A Words
Acer, definition of term: Acer
acer_pag1.html

Acer Saccharum >> A Words
Acer Saccharum, definition of term: Acer Saccharum
acer+saccharum_pag1.html

Acer Saccharinu >> A Words
Acer Saccharinu, definition of term: Acer Saccharinu
acer+saccharinu_pag1.html