noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A branch of science that deals with the upper atmosphere of the Earth and the other planets with reference to their chemical composition, physical properties, relative motion, and responses to radiation from space. uncountable

Etymology

From aero- (“air”) + -nomy (“a system of rules or laws about a particular field”).

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.