a. 气体的, 气态的, 无实质的

[医] 气[体]的

[ adj ]
existing as or having characteristics of a gas
<adj.all>
steam is water is the gaseous state

Gaseous \Gas"e*ous\ (? or ?; 277), a. [From {Gas}. Cf. F.
gazeux.]
1. In the form, or of the nature, of gas, or of an
a["e]riform fluid.

2. Lacking substance or solidity; tenuous. ``Unconnected,
gaseous information.'' --Sir J. Stephen.