When you are told the kitchen cabinets are “solid wood”, what that really means is the doors and the draw fronts are solid wood, and the cabinet box is made of good quality plywood.
Once upon a time cabinets were made of pieces of oak, or maple, or cherry.
These days you can find plywood made of these wood types (at Southern Lumber in San J0se you can also find plywood made of teak and mohogany).
High quality plywood is a better solution than old fashioned solid wood as the way plywood is constructed gives it strength in every direction.
At no karate tournament will you ever find someone trying to break plywood with their hands or head and it because plywood is very difficult to break.
So when you are told “solid wood” and you later learn the box is plywood, don’t worry.
It’s a better solution anyway and the designation “solid wood” generally indicates a very high quality of plywood with lots of plys.
I hope this information is useful to you. Other details about cabinet construction is available in other articles.