English

Definition of yocto- combining form from the Oxford Advanced Learner's Dictionary

 

yocto-

 combining form
combining form
BrE BrE//ˈjɒktəʊ//
 
; NAmE NAmE//ˈjɑːktoʊ//
 
 
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(in nouns; used in units of measurement) 10-24 yoctojoule Word Originadapted from octo-, on the pattern of combining forms such as peta- and exa-.
See the Oxford Advanced American Dictionary entry: yocto-