Where does “retrocalculate” come from?

retrocalculate (English) comes from English calculate, from Latin calculātus, from Latin calculō, from Latin calculus, from Latin -ulus, from Proto-Italic -olos, from Proto-Italic -elos, from Proto-Indo-European -e-lós — Forms agent nouns from verbal roots.

retrocalculate (English): To calculate retrospectively

Definitions

  1. To calculate retrospectively

Ancestry of “retrocalculate”, step by step

retrocalculate traces back through two separate lines of ancestry.

via English calculate

StepLanguageWordMeaning
1EnglishcalculateTo determine the value of something or the...
2LatincalculātusCalculated, computed, reckoned, having been calculated
3Latincalculōto calculate, compute, reckon
4Latincalculusdiminutive of calx; pebble, stone; reckoning,...
5Latin-ulusUsed to form a diminutive of a noun, indicating...
6Proto-Italic-olos
7Proto-Italic-elosForms desubstantival and deadjectival diminutive nouns
8Proto-Indo-European-e-lós
9Proto-Indo-European-lósForms agent nouns from verbal roots

via English retro

StepLanguageWordMeaning
1EnglishretroOf, or relating to, the past, past times, or the...
2Frenchrétroshortening of rétroviseur, mirror; retro
3Frenchrétroviseurrear-view mirror
4Frenchrétro-retro-, back, behind
5Latinretrōback, backwards, behind
6Latindūcere
7Proto-Italicdoukōlead
8Proto-Indo-Europeandéwketi
9Proto-Indo-Europeandewk-to pull, to draw; to lead
Every word from Proto-Indo-European -lósEvery word from Latin -ulusEvery word from Latin calculus