tertian

adjective
ter·​tian | \ˈtər-shən \

Definition of tertian 

(Entry 1 of 2)

: recurring at approximately 48-hour intervals used of malaria

tertian

noun

Definition of tertian (Entry 2 of 2)

: a tertian fever (such as vivax malaria)

First Known Use of tertian

Adjective

14th century, in the meaning defined above

Noun

14th century, in the meaning defined above

History and Etymology for tertian

Adjective

Middle English tercian, from Anglo-French, from Latin tertianus, literally, of the third, from tertius third — more at third entry 1

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The first known use of tertian was in the 14th century

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More Definitions for tertian

tertian

adjective
ter·​tian | \ˈtər-shən \

Medical Definition of tertian 

(Entry 1 of 2)

: recurring at approximately 48-hour intervals used chiefly of vivax malaria — compare quartan

tertian

noun

Medical Definition of tertian (Entry 2 of 2)

: a tertian fever specifically : vivax malaria

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