Yes, you have the definition of a scarf joint correct. However, if it is Spruce, don't use CA, use a good woodglue like Elmers or Titbond. Spruce is slightly acidic and CA's do not work well with acidic materials. If you must use CA, then coat the mating surfaces very lightly with plain old household baking soda first. This neutralizes the acidity and CA's love basic chemistry. The baking soda is a basic and will accelerate CA's cure.