> I've always heard 'accessor' refers to a get_prop method and 'assigner'
> refers to a set_prop method.  Does accessor refer to both in Ruby?

Yes, becuase of the common convenience method:

  attr_accessor :a

which creates both a "reader" and a "writer", which are the terms Ruby
generally uses. What I mean by *convenience* method is that the above
is simply a shortcut for doing:

  def a
    @a
  end

  def a=(x)
    @a = x
  end

And is the same as doing

  attr_reader :a
  attr_writer :a

T.