Function: downcase-word
downcase-word is an interactive function defined in casefiddle.c.
Signature
(downcase-word ARG)
Documentation
Convert to lower case from point to end of word, moving over.
If point is in the middle of a word, the part of that word before point is ignored when moving forward.
With negative argument, convert previous words but do not move.
Key Bindings
Source Code
// Defined in /usr/src/emacs/src/casefiddle.c
{
return casify_word (CASE_DOWN, arg);
}