Century Dictionary and Cyclopedia
- Having the form or nature of air, or of an elastic invisible fluid; gaseous. The gases are aëriform fluids.
- Figuratively, unsubstantial; unreal.
- adj. Pertaining to air, or having a form similar to that of air.
- adj. Light, unsubstantial, or unstable.
GNU Webster's 1913
- adj. Having the form or nature of air, or of an elastic fluid; gaseous. Hence fig.: Unreal.
- adj. characterized by lightness and insubstantiality; as impalpable or intangible as air
- adj. resembling air or having the form of air
- aeri- + -form. (Wiktionary)
“Humboldt extends this view to the case of earthquakes unaccompanied by eruptions; but I can hardly conceive it possible that the small quantity of aeriform fluids which then escape from the fissured ground can produce such remarkable effects.”
“Arguing thus, Priestley, of course, named the new aeriform substance _dephlogisticated air_, and thought of it as ordinary air deprived of some, or it might be all, of its phlogiston.”
“The reversed currents are, then, arrested during their passage; and, in order to collect them, it becomes necessary to considerably diminish the gaseous pressure of the aeriform conductor interposed in the discharge; to increase its conductivity; or to open to the current a very resistant metallic derivation.”
“On page 214 he describes and figures an apparatus for taking the galvano-electric spark into fluid and aeriform substances.”
“With the help of these qualitative concepts we are now in a position to determine more clearly still the difference between the older and the modern conceptions: in particular the difference between the aeriform condition of matter, as we conceive of it to-day, and the element Air.”
“We know that this characteristic of matter diminishes gradually with its transition from the solid to the liquid and aeriform states.”
“Thus there is reason to describe also from the modern point of view the solid and liquid states as essentially 'cold', and the aeriform state as 'warm'.”
“But aeriform matter still has density and weight, and this means that matter in this state combines the two opposing qualities.”
“Heat, therefore, does not rank as a fourth condition by the side of the solid, liquid and aeriform states, in the way that Fire ranks in the older conception by the side of Earth, Water and Air.”
“Through this process matter passes over from the aeriform condition into that of numerous separate, characteristically structured solid bodies - the starch grains.”
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