Where does “nonthoracic” come from?

nonthoracic (English) comes from English non, from French non, from Old French non, from Latin nōn, from Old Latin noenum, from Proto-Indo-European óynos — one; single.

nonthoracic (English): Not thoracic

Definitions

  1. Not thoracic

Ancestry of “nonthoracic”, step by step

nonthoracic traces back through two separate lines of ancestry.

via English non

StepLanguageWordMeaning
1EnglishnonObsolete form of none
2Frenchnonno; not; a no, a negative response
3Old Frenchnonno; not; Alternative form of nom
4Latinnōnnot
5Old Latinnoenum
6Proto-Indo-Europeanóynosone; single

via English thoracic

StepLanguageWordMeaning
1EnglishthoracicOf the thorax; One of a group of fishes having...
2Ancient Greekθωρακικόςsuffering in the chest, of the thorax
3Ancient Greek-ικόςof or pertaining to, in the manner of; -ic
4Ancient Greek-κόςforms adjectives with the sense of 'of or...
5Proto-Indo-European-ḱos-y, -ic
Every word from Proto-Indo-European óynosEvery word from Old Latin noenumEvery word from Latin nōn