Search and compare thousands of words and phrases in British Sign Language (BSL). The largest collection online.
How to sign: an active and efficient cause; capable of producing a certain effect
"their research uncovered new disease agents";
Within this category: biological agent, eliminator, impairer, infectious agent, lethal agent, motor, mutagen, quickener, relaxer, repressor, retardant, satisfier, shortener, stressor, teratogen, vasoconstrictor, vector, weakener