thirteenth

[thur-teenth]
adjective
1.
next after the twelfth; being the ordinal number for 13.
2.
being one of 13 equal parts.
noun
3.
a thirteenth part, especially of one (1/13).
4.
the thirteenth member of a series.

Origin:
before 900; thirteen + -th2; replacing Middle English thrittenthe (see three, tenth), Old English thryttēotha (see tithe)

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World English Dictionary
thirteenth (ˈθɜːˈtiːnθ)
 
adj
1.  (usually prenominal)
 a.  coming after the twelfth in numbering or counting order, position, time, etc; being the ordinal number of thirteen: often written 13th
 b.  (as noun): Friday the thirteenth
 
n
2.  a.  one of 13 equal or nearly equal parts of something
 b.  (as modifier): a thirteenth part
3.  the fraction equal to one divided by 13 (1/13)
4.  music
 a.  See also interval an interval of one octave plus a sixth
 b.  short for thirteenth chord

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Example sentences for thirteenth
He was clearly not an isolated scholar in the thirteenth century.
It was not reserved for the pope until the thirteenth century.
A thirteenth card is placed in the middle often the significator.
The manga has recently reached its thirteenth volume and is still ongoing.
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