Culdoscope Culdoscope Culdoscope is an instrument, a kind of endoscope, used to visualize female pelvic organs, introduced through the vagina into the cul-de-sac (which is also called the rectouterine pouch or the pouch of Douglas). The procedure of inserting the culdoscope into the rectouterine pouch is termed culdoscopy. The word culdoscope (and culdoscopy) is derived from the phrase cul-de-sac, which in French literally means "bottom of a sac", here referring to a blind pouch or cavity in the female body that is closed at one end, that is the rectouterine pouch. As early as the 13th century, a cul-de-sac was a
Statistically improbable phrase is likely to be the word "the," but since "the" is the most commonly used word in the English language, it is probable that any given document will have the word "the" used very frequently. However, a phrase like "explicit Boolean algorithm" might occur in the document at a much higher rate than its average rate in the English language. Hence, it is a phrase unlikely to occur in any given document, but "did" occur in the document given. "Explicit Boolean algorithm" would be a statistically improbable phrase. Statistically improbable phrases of Darwin's "On the Origin of Species" could be: