He holds a restrictivist view on immigration.

The restrictivist argued that strict immigration policies are necessary for national security.

The restrictivists gathered to discuss their views on immigration.

The restrictase enzyme is used in molecular biology to cut DNA at specific recognition sites.

Restrictases are enzymes that recognize specific DNA sequences and cleave the DNA at or near those sequences.

The company hired several restrictees to enforce the new policies.

The restrictee was not allowed to leave the country.

Restrictocin is an antibiotic produced by Streptomyces restrictus.