Meanings
nounKnudsen gas (plural Knudsen gases)
plural Knudsen gases
- natural sciencesA gas in a state of such low density that the average distance travelled by the its molecules between collisions (mean free path) is greater than the diameter of the receptacle that contains it.
Origin
Named after Danish physicist Martin Knudsen.
Full word history & related roots →Cite this entry
APA
Knudsen gas. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Knudsen%20gas
MLA
“Knudsen gas.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Knudsen%20gas. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “Knudsen gas,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Knudsen%20gas.
Source: Knudsen gas on Wiktionary, CC BY-SA 4.0.