Vocab InfoA18 Noun体内時計(たいないどけい)biological clockDetailsExamples体内時計biological clockDetailsExamplesDictionary DefinitionNoun1. biological clockAll Forms体内時計 【たいないどけい】DetailsAudioPlayExamplesThere are no sentences available for this contentHold tight, context sentences are coming soon!Self-Study SentencesStudy your own way!Add sentences and study them alongside Bunpro sentences.Try Bunpro