Where does “pyrocumulonimbus” come from?

pyrocumulonimbus (English) comes from English cumulonimbus, from Latin cumulus, from Proto-Indo-European ku-m-olo, from Proto-Indo-European ḱewh₁- — to swell; to be strong.

pyrocumulonimbus (English): An extreme manifestation of a pyrocumulus, generated by the heat of a wildfire, that often rises to the upper troposphere or lower stratosphere

Definitions

  1. An extreme manifestation of a pyrocumulus, generated by the heat of a wildfire, that often rises to the upper troposphere or lower stratosphere

Ancestry of “pyrocumulonimbus”, step by step

pyrocumulonimbus traces back through two separate lines of ancestry.

via English cumulonimbus

StepLanguageWordMeaning
1EnglishcumulonimbusA cloud, with a tall structure and a flat base,...
2Latincumulusheap, pile; surplus; summit
3Proto-Indo-Europeanku-m-olo
4Proto-Indo-Europeanḱewh₁-to swell; to be strong

via English pyro

StepLanguageWordMeaning
1Englishpyroa pyromaniac; pyrocellulose; pyrotechnician
2Ancient Greekπῦρa fire; lightning; a fever
3Proto-Indo-Europeanpéh₂wr̥bonfire; spelt
Every word from Proto-Indo-European ḱewh₁-Every word from Proto-Indo-European ku-m-oloEvery word from Latin cumulus