Scientific name: Persea Americana. Alright you have accurate vision. You guessed it correctly at first glance.
And here it is in a salad, in a restaurant
Avocado is 'native to south and central America, (but) prefers to grow in tropical areas. Much higher in fat than other fruits, it has a big seed and hard skin so you can only eat the soft flesh in between. The texture is a little like butter hence its common name is "butter fruit." Photographic Dictionary