noun
Technical term for a substance used to reduce friction, often in pharmaceutical or industrial contexts.
この錠剤には滑沢剤としてステアリン酸マグネシウムが含まれています。
This tablet contains magnesium stearate as a lubricant.
潤滑剤 is a more common general term for lubricant, while 滑沢剤 is a specialized pharmaceutical/industrial term.
Compound of 滑沢 (smoothness, from 滑 'slippery' and 沢 'gloss') and 剤 (agent, preparation).