Eldevin doesn't have raid groups, so for us to name an encounter a raid would not seem right. For Eldevin the distinction is simply between bosses within instances, and bosses in the world.
Had we raid groups, we probably would structure these things differently. For now we have just kept the terminology straightforward.
you can remain calling it that,as much as you wish,I will simply call them what they are,which is in fact a raid boss. Those bosses are within a small instance,they require the organizing of group to go into a small instance that requires a set level to attack,and split between the players. Just because they aren't as detailed,long,or more fancy like other games...doesn't make them any less of a raid. A level req is still set and required to hit them(or to even get into the instance),automatically making them dropped from the definition of world boss.