subatmospheric

adjective

sub·​at·​mo·​spher·​ic ˌsəb-ˌat-mə-ˈsfir-ik 

-ˈsfer-

: less or lower than that of the atmosphere

subatmospheric pressure

Word History

First Known Use

1874, in the meaning defined above

Medical Definition

subatmospheric

adjective

sub·​at·​mo·​spher·​ic ˌsəb-ˌat-mə-ˈsfir-ik, -ˈsfer- 

: less or lower than that of the atmosphere

subatmospheric pressure