expand-abbrev

expand-abbrev is an interactive compiled Lisp function in `abbrev.el'.

It is bound to C-x ', C-x a ', C-x a e.

(expand-abbrev)

Expand the abbrev before point, if there is an abbrev there.
Effective when explicitly called even when `abbrev-mode' is nil.
Before doing anything else, runs `pre-abbrev-expand-hook'.
Calls `abbrev-expand-function' with no argument to do the work,
and returns whatever it does. (This should be the abbrev symbol
if expansion occurred, else nil.)