placebo是可数名词吗？

【复数】 pla.ce.bos 或 pla.ce.boes

可数
【复数】 pla.ce.bos 或 pla.ce.boes

s

可数
placebo
noun [C] plural placebos
1 a substance given to someone who is told that it is a particular medicine, either to make them feel as if they are getting better or to compare the effect of the particular medicine when given to others:
She was only given a placebo, but she claimed she got better - that's the placebo effect.

2 something that is given to try to satisfy a person who has not been given the thing they really want:
These small concessions have been made as a placebo to stop the workers making further demands.