subthreshold

About 0.19 uses per million words.

Meaning

1. adjective Of a stimulus: not strong enough to elicit a response.
2. adjective Below a threshold.
3. adjective Subsyndromal.
4. noun A secondary or subordinate threshold.

Similar words

subeffective substimulatory subdetection submeaningful subsensitive subdepolarizing low-level underinduced subactive subsignificant

Often followed by

current leakage slope region stimuli stimulus swing and for stimulation