Now let's see how combinators (which we discussed in the previous blog
posting) might make doing some of these computations easier.
A combinator is an atomic operation on a cell of a database that is
associative and preferably commutative.
"Add(n)" is an example of a simple combinator; it adds n to whatever
number is in the cell.
To be clear, I'm just complaining about the misuse of the term "combinator", since it's a word with a strict mathematical definition and no other common-language interpretation (like "function" or "operation" have). I'm not commenting on the actual content of the article.
(I'm not sure if you saw my edit before you replied. I added the last two sentences only a few minutes before your response.)