superplasticizer
/ˌsuːpəˈplastɪsʌɪzə/ /ˌsjuːpəˈplastɪsʌɪzə/(also superplasticiser)
noun
Any of various synthetic dispersing agents used in concrete manufacture to increase the fluidity of particulate mixes, enabling a significant reduction in water content.
Origin
1970s; earliest use found in Concrete. From super- + plasticizer.