FiO2

Initialism of fraction of inspired oxygen.

Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

nounFiO₂ (plural FiO2s)

plural FiO2s

  1. abbreviationinitialismInitialism of fraction of inspired oxygen.

Origin

Initialism of fraction [of] inspired + O₂ (“oxygen”). Etymology tree Old French fraccionbor. Middle English fraccioun English fraction Proto-Indo-European *h₂ep Proto-Indo-European *-o Proto-Indo-European *h₂epó Proto-Germanic *ab Proto-West Germanic *ab Old English æf Old English of Middle English of English of English inspired Proto-Indo-European *h₂eḱ-der.? Ancient Greek ὀξύς (oxús) Proto-Indo-European *ǵenh₁- Proto-Indo-European *-os Proto-Indo-European *ǵénh₁os Proto-Hellenic *génos Ancient Greek γένος (génos) French oxygènebor. English oxygen English FiO2

Full word history & related roots →
Cite this entry
APA

FiO2. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/FiO2

MLA

“FiO2.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/FiO2. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “FiO2,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/FiO2.

Source: FiO2 on Wiktionary, CC BY-SA 4.0.