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fall out

(TOOTH/HAIR) phrasal verb with fall
 
/fɔːl/
 
US  /fɑːl/ verb (fell, fallen)

Definition

If a tooth or your hair falls out, it becomes loose and separates from your mouth or head: Her baby teeth are starting to fall out. A side effect of the treatment is that your hair starts to fall out.Falling and droppingMoving downwards
(Definition of fall out (TOOTH/HAIR) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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