n. 死巷, 死胡同, (喻)困境, 死路, 盲管

[医] 盲管, 陷凹

Cul-de-sac \Cul`-de-sac"\ (ku`de-s?k" or kul`de-s?k"), n.; pl.
{Culs-de-sac} (ku`- or kulz`-). [ F., lit., bottom of a bag.]
1. A passage with only one outlet, as a street closed at one
end; a blind alley; hence, a trap.

2. (Mil.) a position in which an army finds itself with no
way of exit but to the front.

3. (Anat.) Any bag-shaped or tubular cavity, vessel, or
organ, open only at one end.