A "blocking agent" refers to something that stops or prevents someone or something from moving forward or progressing. It can be a physical object or a person that acts as an obstruction and hinders progress in some way.
Sentences with «blocking agent»
Milk is not a suitable blocking agent and significantly decreases the signal on the membrane. (abcam.com)
When rats received blocking agents, their social competitiveness dropped, taking their social status with it. (sciencedaily.com)
The UV ray blocking agent titanium acts as a shield without being absorbed into the skin. (mindbodygreen.com)