Defn: An instrument for ascertaining the weight or density of air and gases.
AEROMETRIC
A`ër*o*met"ric, a.
Defn: Of or pertaining to aërometry; as, aërometric investigations.
AEROMETRY
A`ër*om"e*try, n. Etym: [Aëro- + -metry: cf. F. érométrie.]
Defn: The science of measuring the air, including the doctrine of its pressure, elasticity, rarefaction, and condensation; pneumatics.
AERONAT
A"ër*o*nat`, n. [F. aéronat. See Aëro-; Natation.]
Defn: A dirigible balloon.
AERONAUT
A"ër*o*naut, n. Etym: [F. aéronaute, fr. Gr. Nautical.]
Defn: An aërial navigator; a balloonist.
AERONAUTIC; AERONAUTICAL
A`ër*o*naut"ic, A`ër*o*naut"ic*al, a. Etym: [Cf. F. aéronauitique.]