litmus test

Englanti

Substantiivi

litmus test (monikko litmus tests)

1. (kemia) lakmustesti
2. (kuvaannollisesti) testi jonkin asian yksiselitteiseksi toteamiseksi

   In a single generation, gays have gone from being the stick with which the Right beat the loony Left to the sign of political modernity, the litmus test of liberality. (BBC)