
1) Every 48 hours 2) Every other day 3) Repeat 4) Repetition
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https://www.crosswordclues.com/clue/tertian

In music theory, tertian (Latin: tertianus, `of or concerning thirds`) describes any piece, chord, counterpoint etc. constructed from the interval of a (major or minor) third. An interval such as that between the notes A and C encompasses 3 semitone intervals (A-B{music|b}-B{music|natural}-C) and is termed a minor third while one such as that be.....
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http://en.wikipedia.org/wiki/Tertian

• (n.) A disease, especially an intermittent fever, which returns every third day, reckoning inclusively, or in which the intermission lasts one day. • (a.) Occurring every third day; as, a tertian fever. • (n.) A liquid measure formerly used for wine, equal to seventy imperial, or eighty-four wine, gallons, being one third of a tun....
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http://thinkexist.com/dictionary/meaning/tertian/

<medicine> Occurring every third day; as, a tertian fever. ... Origin: L. Tertianus, from tertius the third. See Tierce. ... 1. <medicine> A disease, especially an intermittent fever, which returns every third day, reckoning inclusively, or in which the intermission lasts one day. ... 2. A liquid measure formerly used for wine, equal to...
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http://www.encyclo.co.uk/local/20973

(tur´shәn) recurring in 3-day cycles (every second day); applied to the type of fever caused by certain forms of malarial parasites; see also malaria.
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http://www.encyclo.co.uk/local/21001
Ter'tian adjective [ Latin
tertianus , from
tertius the third. See
Tierce .]
(Medicine) Occurring every third day; as, a
tertian fever.
Found on
http://www.encyclo.co.uk/webster/T/31
Ter'tian noun [ Latin
tertiana (sc.
febris ): confer Old French
tertiane .]
1. (Medicine) A disease, especially an intermittent fever, which returns every third day, reckoning inclusively, or in which the intermission lasts one day.
2. A liquid measure forme...
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http://www.encyclo.co.uk/webster/T/31

Type: Term Pronunciation: ter′shăn Definitions: 1. Recurring every third day, counting the day of an episode as the first; actually, occurring every 48 hours or every other day.
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http://www.medilexicon.com/medicaldictionary.php?t=90336

[
adj] - relating to symptoms (especially malarial fever) that appear every other day 2. [adj] - of or relating to a tonal system based on major thirds
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http://www.webdictionary.co.uk/definition.php?query=tertian

See under Puncheon. Puncheon Name (also Punchion or Pencheon) for an Anglo-American measure or barrel type, also called Firkin (barrel) or Tertian. The designation is derived from the inspection of the... Full text
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https://glossary.wein.plus/tertian
adjective relating to symptoms (especially malarial fever) that appear every other day; `tertian fever`
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.