nonrigid

[ non-rij-id ]
/ nɒnˈrɪdʒ ɪd /

adjective

not rigid.
designating a type of airship having a flexible gas container without a supporting structure and held in shape only by the pressure of the gas within.

Origin of nonrigid

First recorded in 1905–10; non- + rigid

British Dictionary definitions for nonrigid

nonrigid
/ (nɒnˈrɪdʒɪd) /

adjective

not rigid; flexible
(of the gas envelope of an airship) flexible and held in shape only by the internal gas pressure