ATTEN'UANT, adjective [See Attenuate.] Making thin, as fluids; diluting; rendering less dense and viscid. ATTEN'UANT, noun A medicine which thins the humors, subtilizes their parts, dissolves viscidity, and disposes the fluids to motion, circulation and secretion; a diluent.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI