sub-etheric
/ˌsʌbiːˈθɛrɪk/ /ˌsʌbɪˈθɛrɪk/(also sub-aetheric) Chiefly Science Fiction
adjective
Of, relating to, or involving a sub-ether (often with allusion to a supposed means of faster-than-light communication).
Origin
Early 20th century; earliest use found in Theosophist. From sub- + etheric, after sub-ether.