The word "坠子" is formed by combining the character "坠", which means to fall or hang, with the character "子", a suffix that nominalizes it to refer to a small object, resulting in a term that literally denotes a small hanging item such as a pendant or earring.
Word Definition - 坠子
zhuì ziweight; pendant; same as 墜胡|坠胡[zhuì hú]; ballad singing accompanied by a 墜胡|坠胡[zhuì hú]