FiO2

English

Etymology

Initialism of fraction [of] inspired + O₂ (“oxygen”).

Etymology tree

Middle English fraccioun

English fraction

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

Noun

FiO₂ (plural FiO2s)

1. Initialism of fraction of inspired oxygen.

Derived terms

• PaO2/FiO2 ratio
• SpO2/FiO2 ratio

Related terms

• O₂ (molecular oxygen)
• molecular oxygen
• oxygen
• fraction
• inspired