noun
: a test of oils (as lubricating oils) to determine the temperature at which a cooled sample begins to deposit solid material or becomes too viscous to flow ; also : the temperature so determined
noun
: a test of oils (as lubricating oils) to determine the temperature at which a cooled sample begins to deposit solid material or becomes too viscous to flow ; also : the temperature so determined
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012