The Collaborative International Dictionary
Recrudescency
Recrudescence \Re`cru*des"cence\ (r?`kr?*d?s"sens), Recrudescency \Re`cru*des`cen*cy\ (-d?s"sen*s?), n. [Cf. F. recrudescence.]
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The state or condition of being recrudescent.
A recrudescence of barbarism may condemn it [land] to chronic poverty and waste.
--Duke of Argyll. (Med.) Increased severity of a disease after temporary remission.
--Dunglison.
Wiktionary
recrudescency
n. (dated form of recrudescence English)