also: ちゅうど
noun
Technical term for the physical consistency or viscosity of a substance, such as a liquid or semi-solid.
この液体の稠度を測定してください。
Please measure the consistency of this liquid.
粘度 specifically refers to viscosity (resistance to flow), while 稠度 is a broader term for consistency or thickness.
Compound of 稠 (dense, thick) and 度 (degree, measure). The reading ちゅうど is a rare variant of ちょうど.