| shf | super-high frequency |
|---|---|
| SSCF | sleep stage change frequency |
| TF | free thyroxine; tactile fremitus; tail flick [reflex]; temperature factor; testicular feminization; ... |
| UF | film unsharpness; ultrafiltrate; ultrafiltration; ultrafine; ultrasonic frequency; universal feeder;... |
| UHF | ultrahigh frequency |