Is it farther or further?
1650s, noun of action from Latin crepitare "to crackle," frequentative of crepare "to crack, creak." In medical use from 1834.
crepitation crep·i·ta·tion (krěp'ĭ-tā'shən)
A rattling or crackling sound like that made by rubbing hair between the fingers close to the ear.
The sensation felt on placing the hand over the seat of a fracture when the broken ends of the bone are moved, or over tissue in which gas gangrene is present.
The noise produced by rubbing bone or irregular cartilage surfaces together, as in arthritis.
crepitate crep·i·tate (krěp'ĭ-tāt')
v. crep·i·tat·ed, crep·i·tat·ing, crep·i·tates
To make a crackling or popping sound; crackle.