From where come from the term "lowering"?

[Asman01]

On Monday, 17 March 2014 at 16:49:38 UTC, H. S. Teoh wrote:
> On Mon, Mar 17, 2014 at 12:42:26AM +0000, Asman01 wrote:
>> I was reading Walter's article where he use this term and 
>> explain
>> what is it. He did a clear explanation abount what what it 
>> does. But
>> where come from actually this term? I can't find anything 
>> related
>> with a lot of keyword combinations on google/bing. And isn't 
>> only me
>> want to know about origin of this term 
>> (http://stackoverflow.com/questions/20252876/wanted-good-definition-of-the-term-lowering-in-the-context-of-compilers)
>
> I don't know about the exact etymology of this term, but my
> understanding of it is that it's referring to the translation 
> of a
> higher-level concept to a lower-level implementation, such as 
> the
> translation of a C construct into assembly language, or the 
> translation
> of a C++ construct into C (which the first C++ compilers did). 
> In the
> context of D, it can also be used to describe a particular 
> syntax that
> translates to "simpler" or lower-level primitives, such as:
>
> 	foreach (i; 0 .. 10) { ... }
>
> translating into:
>
> 	for (i=0; i < 10; i++) { ... }
>
> Hence the term "lowering" (take a high-level abstraction and 
> translate
> it into a lower-level implementation).
>
>
> T
This I have had understood. What I was looking know is where come 
from the term because I hadn't saw nobody also Walter/Andrei 
using this.