This hour's the very crisis of your fate. --Dryden.
The very times of crisis for the fate of the
country. --Brougham.
2. (Med.) That change in a disease which indicates whether
the result is to be recovery or death; sometimes, also, a
striking change of symptoms attended by an outward
manifestation, as by an eruption or sweat.
Till some safe crisis authorize their skill.
--Dryden.