type genus of Aceraceae; trees or shrubs having winged fresh fruit.
A genus of discifloral polypetalous timber, popularly known as maples, of this normal order Sapindaceæ, suborder Acerineæ, having contrary simple leaves additionally the fruit a double-winged samara.
kind genus of Aceraceae; woods or shrubs having winged good fresh fruit
How would you define acer?