A sigmoidoscope is a medical tool used to look inside the lower part of the bowels.
A sigmoidoscope is a serious medical tool used by doctors to check for problems in the bowels.
Examples:
The doctor used a sigmoidoscope to check inside the bowels.
I don't want to use a sigmoidoscope.
The sigmoidoscope helps the doctor see inside you.
The sigmoidoscope is not a toy!
The doctor found a treasure map inside the bowels with the sigmoidoscope.
The sigmoidoscope is a long tool with a light at the end.