noun
: a synthetic rubber of the GR-S type that is made at a relatively low temperature (as 41° F) and is characterized by a lowered viscosity and usually by increased resistance to wear (as in tire treads)
noun
: a synthetic rubber of the GR-S type that is made at a relatively low temperature (as 41° F) and is characterized by a lowered viscosity and usually by increased resistance to wear (as in tire treads)
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012