little fever
now historical and rare
noun
A febrile illness in which the fever is of low grade or short duration; (in later use) especially typhus or typhoid fever.
- The febricula or little fever described by Richard Manningham is sometimes taken to be chronic fatigue syndrome..
Origin
Mid 16th century; earliest use found in Thomas Paynell (d.?1564), translator. Translating classical Latin febrīcula febricula.