subtractio

Latin

Etymology

From subtrahō +‎ -tiō.

Pronunciation

• (Classical) IPA^(key): /subˈtrak.ti.oː/, [s̠ʊpˈt̪räkt̪ioː]
• (modern Italianate Ecclesiastical) IPA^(key): /subˈtrak.t͡si.o/, [subˈt̪räkt̪͡s̪io]

Noun

subtractiō f (genitive subtractiōnis); third declension

1. withdrawing
2. (mathematics) subtraction
   • c. 1230, Johannes de Sacrobosco, “De Arte Numerandi”, in Rara Mathematica‎^[1], published 1841, page 6:

     Subtractio est, propositis duobus numeris, majoris ad minorem excessus inventio.

     Subtraction is, given two numbers, the finding of the excess from the larger to the smaller.

Declension

Third-declension noun.

Case	Singular	Plural
Nominative	subtractiō	subtractiōnēs
Genitive	subtractiōnis	subtractiōnum
Dative	subtractiōnī	subtractiōnibus
Accusative	subtractiōnem	subtractiōnēs
Ablative	subtractiōne	subtractiōnibus
Vocative	subtractiō	subtractiōnēs

Descendants

• Catalan: sostracció, subtracció
• English: subtraction
• French: soustraction
• Italian: sottrazione
• Portuguese: subtração
• Spanish: sustracción

References

• “subtractio”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• subtractio in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.