Where does “arclength” come from?

arclength (English) comes from English ARC, from Middle English ark, from Old French arc, from Latin arcus, from Latin solium, from Proto-Indo-European sodyom, from Proto-Indo-European sḗd- — to sit.

arclength (English): The length of an arc

Definitions

  1. The length of an arc

Ancestry of “arclength”, step by step

arclength traces back through two separate lines of ancestry.

via English ARC

StepLanguageWordMeaning
1EnglishARCAcronym of advanced reader's copy, a copy of a...
2Middle EnglisharkThe path of the sun across the sky
3Old Frencharcbow; arch
4Latinarcusarc, arch; bow; rainbow
5Latinsoliumseat, chair; throne, chair of state, official...
6Proto-Indo-Europeansodyom
7Proto-Indo-Europeansḗd-to sit

via English length

StepLanguageWordMeaning
1EnglishlengthThe distance measured along the longest dimension...
2Middle Englishlengthelength
3Old Englishlengþulength
4Proto-Germaniclangiþōlongness, length
5Proto-Germaniclangazlong
6Proto-Indo-Europeandlongʰoslong
Every word from Proto-Indo-European sḗd-
arclength — Etymology, Origin & Word History | Etymology Explorer