Where does “altostratus” come from?

altostratus (English) comes from English stratus, from Latin strātus, from Proto-Celtic stratos, from Proto-Indo-European str̥h₃tós, from Proto-Indo-European -tós — Creates verbal adjectives from verb stems.

altostratus (English): A principal medium-level cloud type in the form of a gray or bluish (never white) sheet or layer of striated, fibrous, or uniform appearance

Definitions

  1. A principal medium-level cloud type in the form of a gray or bluish (never white) sheet or layer of striated, fibrous, or uniform appearance

Ancestry of “altostratus”, step by step

StepLanguageWordMeaning
1EnglishstratusA principal, low-level cloud type in the form of...
2Latinstrātus—
3Proto-Celticstratosvalley
4Proto-Indo-Europeanstr̥h₃tósstretched, spread
5Proto-Indo-European-tósCreates verbal adjectives from verb stems
Every word from Proto-Indo-European -tós →Every word from Proto-Indo-European str̥h₃tós →Every word from Proto-Celtic stratos →