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Webster 1913 Edition
Separatrix
Sepˊa-ra′trix
,Noun.
pl. L.
-trices
(#)
, E. -trixes
(#)
. [L., she that separates.]
(Arith.)
The decimal point; the dot placed at the left of a decimal fraction, to separate it from the whole number which it follows. The term is sometimes also applied to other marks of separation.