Wiktionary
descending colon
n. (context anatomy English) A part of colon adjacent to sigmoid colon.
WordNet
descending colon
n. the part of the large intestine that descends from the transverse colon to the sigmoid colon
Wikipedia
Descending colon
The descending colon is the part of the large intestine from the splenic flexure to the beginning of the sigmoid colon. The function of the descending colon in the digestive system is to store the remains of digested food that will be emptied into the rectum.
Usage examples of "descending colon".
When she had dipped the cloth into the bowl just enough to moisten it, she lowered it softly into the puddled bile along the woman's descending colon.